WO1995031116A1 - High protein and/or reduced fat nut spread and process for preparing it - Google Patents

High protein and/or reduced fat nut spread and process for preparing it Download PDF

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Publication number
WO1995031116A1
WO1995031116A1 PCT/US1995/004027 US9504027W WO9531116A1 WO 1995031116 A1 WO1995031116 A1 WO 1995031116A1 US 9504027 W US9504027 W US 9504027W WO 9531116 A1 WO9531116 A1 WO 9531116A1
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WO
WIPO (PCT)
Prior art keywords
nut
mixture
spread
less
particle size
Prior art date
Application number
PCT/US1995/004027
Other languages
French (fr)
Inventor
Vincent York-Leung Wong
Francisco Valentino Villagran
Richard Joseph Sackenheim
Original Assignee
The Procter & Gamble Company
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by The Procter & Gamble Company filed Critical The Procter & Gamble Company
Priority to MX9605563A priority Critical patent/MX9605563A/en
Priority to AU22354/95A priority patent/AU2235495A/en
Priority to EP95915488A priority patent/EP0804092B1/en
Priority to CA002189746A priority patent/CA2189746C/en
Priority to DE69514687T priority patent/DE69514687T2/en
Priority to JP52963695A priority patent/JP3664257B2/en
Priority to AT95915488T priority patent/ATE188845T1/en
Publication of WO1995031116A1 publication Critical patent/WO1995031116A1/en

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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L25/00Food consisting mainly of nutmeat or seeds; Preparation or treatment thereof
    • A23L25/10Peanut butter

Definitions

  • the present invention relates to a continuous process for adding solids to peanut paste that results in a fluid, nongritty nut spread having superior peanut flavor.
  • Reduced fat peanut spreads having desirable fluidity and smooth texture can be prepared according to the continuous process of the present invention.
  • peanut and other nut butters or spreads consist of a mixture of solid nut particles, liquid oil, flavorants, e.g., a sweetener such as sugar, high fructose corn syrup or honey, and salt, and a stabilizer.
  • flavorants e.g., a sweetener such as sugar, high fructose corn syrup or honey, and salt
  • a stabilizer e.g., a sweetener such as sugar, high fructose corn syrup or honey, and salt
  • Peanut butters typically contain about 50% oil and about 50% solids. Peanut butters containing these levels of solids and oil have good texture, spreadability and flavor.
  • a peanut spread which contains higher levels of solids. This may be the case, for example, when a high protein and/or reduced fat nut spread is desired.
  • High protein and/or reduced fat nut spreads are typically prepared by increasing the level of solid ingredients present in the final product relative to the level of oil.
  • Reduced fat peanut spreads typically comprise from about 58% to about 75% solids and from about 25% to about 42% oil.
  • Walling et al utilizes extrusion roasting or a combination of roll milling and high shear mixing to prepare defatted peanut solids to be combined with undefatted peanuts in the preparation of a low fat peanut spread. See U. S. Patent 5,230,919 issued July 27, 1993. The use of defatted peanuts and intense processing conditions in these processes resulted in peanut spreads with inferior flavor compared to full fat peanut butters. Moreover, the roll milling and extrusion roasting processes taught by Wong et al. and Walling et al. are relatively capital intensive for a peanut manufacturing operation.
  • Co-pending U.S. Patent Application Serial No. 08/136,524 (Wong et al), filed October 14, 1993, also discloses a process for preparing high protein and/or reduced fat nut spreads which have desirable texture and fluidity and which have a nut flavor comparable to conventional full fat nut spreads.
  • the process of the present invention is an improvement over the prior Wong process in several ways.
  • the process of the present invention does not require that the Casson plastic viscosity of the nut spread mixture be adjusted to less than 30 poise before being pumped through the homogenizer. Instead, the homogenizer is operated at higher pressures (between 9,000 and 14,500 psig compared to less than 8,000 psig in the prior application). This make the processing of the nut spread easier and less costly.
  • the mechanism for preparing the nut butters is different.
  • the viscosity of the nut butter actually rose after homogenization. This does not occur in the process of the present invention because of the higher solids concentration during homogenization (higher particle to particle sharing).
  • the cooling step of the process of the present invention contributes to certain flavor benefits that are recognized in nut spreads prepared according to the process of the present invention (e.g., gets rid of any off flavor that might otherwise result).
  • the present invention relates to a continuous process for preparing a high protein or low fat nut spread having desirable fluidity, texture and flavor.
  • the process comprises as a first step depositing a nut paste in a mixing tank (step a).
  • step a depositing a nut paste in a mixing tank
  • step b the solid ingredients which are to be present in the final product spread are mixed into the tank containing the peanut paste and the mixture of peanut paste and solid ingredients is passed through a high shear mixer (step b).
  • the temperature of the mixture is then adjusted such that the temperature of the nut paste exiting the homogenizer in step (d) is less than 240°F (step c).
  • the nut spread product has a monomodal or bimodal particle size distribution such that at least 50% of the solids in the nut spread have a particle size of less than 18 microns and 90% of the solids in the nut spread have a particle size of less than 60 microns, a Casson plastic viscosity of from about 8 to about 17 poise and a Casson yield value of less than about 300 dynes per square centimeter.
  • the present invention relates to a continuous process for preparing high protein and/or low fat nut spreads having desirable fluidity, texture and flavor.
  • nut spread as used herein means a spreadable food product made from nut solids and oil. Nut spreads typically contain from about 58% to about 75% solids and from about 25% to about 42% oil or fat. The remainder of the nut spread comprises additives such as sweeteners, stabilizers, flavoring agents, proteins and non-nutritive bulking agents.
  • the process of the present invention is particularly suitable for preparing low fat (25% to 42% total fat) peanut spreads.
  • the materials used in the process of the present invention include nut paste and solid ingredients, as well as other optional ingredients.
  • Nut paste The process of the present invention utilizes a nut paste, preferably peanut paste, as a starting material. While this invention will be generally described in terms of peanuts and peanut paste, it should be readily apparent that other materials such as almonds, pecans, walnuts, cashews, filberts, macadamia nuts, brazilians, sunflower seeds, sesame seeds, pumpkin seeds and soybeans could be used to form the nut paste utilized in the process of the present invention.
  • the term "nut” as used herein encompasses these nuts and seeds. Mixtures of these nuts and oil seeds can also be used.
  • the nut paste can be formed by any of a number of known methods.
  • the nuts can be roasted and then ground in a conventional grinder or mill such as a Bauer mill to produce a nut paste of pumpable consistency.
  • the nut paste may optionally be defatted or the particle size of the nut solids of the nut paste may be reduced. See, for example Wong et al.; U.S. Patent 5,097,027; Issued January 7, 1992, herein incorporated by reference.
  • the nut paste will typically comprise from about 50% to about 90% of the nut spread.
  • the nut paste will comprise form about 50% to about 85% of the nut spread. More preferably, the nut paste will comprise from about 55% to about 65% of the nut spread.
  • the process of the present invention also utilizes solid ingredients as a starting material.
  • the solid ingredients used to prepare fluid, nongritty, nut spreads by the process of this invention can include, for example; diluents such as corn syrup solids, maltodextrin, dextrose, polydextrose, fiber, mono- and disaccharides, starches (e.g., corn, potato, wheat) and flours (e.g., wheat, rye, pea); protein supplements such as additional peanut solids, soy flour, soy concentrate, soy isolate, casein, egg whites, and protein from other animal or vegetable sources; or a combination of the above.
  • diluents such as corn syrup solids, maltodextrin, dextrose, polydextrose, fiber, mono- and disaccharides, starches (e.g., corn, potato, wheat) and flours (e.g., wheat, rye, pea)
  • protein supplements such as additional peanut solids, soy flour,
  • the solid ingredients which are added to the nut paste typically comprise from about 13% to about 50% of the nut spread. Preferably, the solid ingredients comprise from about 38% to about 45% of the nut spread. More preferably, the solid ingredients comprise form about 32% to about 43% of the nut spread.
  • the process of the present invention may optionally utilize other ingredients.
  • low calorie oils and zero calorie oils such as sucrose polyesters of long chain fatty acids (olestra) and other polyol polyesters of fatty acids can be used (see for example U. S. Pat. Nos. 3,600,186 to Mattson, et al. and 4,005,196 to Jandacek).
  • Mixed triglycerides made from medium and long chain saturated and/or unsaturated fatty acids can also be used herein.
  • An oil which contains at least 10% medium chain triglycerides can also be used.
  • Medium chain triglycerides contain saturated fatty acids having from six to twelve carbon atoms.
  • the nut spread prepared according to the process of the present invention may also optionally contain a stabilizer.
  • the stabilizer can be any of the known peanut butter stabilizers, for example, hydrogenated rapeseed oil, or other hydrogenated triglycerides having a high proportion of C20 and C22 fatty acids. (See for example, U. S. Pat. No. 3,597,230 and U. S. Pat. No. 3,192,102.)
  • Stabilizers are usually triglycerides which are solid at room temperature. They solidify in the nut butter in specific crystalline states and keep the oil from separating.
  • These materials can be mixed with a second hydrogenated oil having an iodine value of less than 8, for example hydrogenated palm oil, canola oil, soybean oil, cottonseed oil, coconut oil, and similar materials.
  • This stabilizer can also be mixed with lower melting fat fractions as, for example, the peanut butter stabilizer composition disclosed in U. S. Pat. No. 4,341,814 (1982).
  • an emulsifier can be used in the process of the present invention.
  • the emulsifier can be any food compatible emulsifier such as mono- and di-glycerides, lecithin, sucrose monoesters, polyglycerol esters, sorbitan esters, polyethoxylated glycerols and mixtures thereof. Up to about 3% and preferably from 1% to 3% stabilizer or emulsifier is used.
  • flavorants are agents which contribute to or enhance the flavor of the nut butter. These include sweeteners, flavor enhancers, artificial sweeteners, natural and artificial flavors, flavored or candied bits, nut chunks and other additives which contribute to the flavor of the spread. Sweeteners are selected from the group consisting of sugars, sugar mixtures, artificial sweeteners and other naturally sweet materials. Sugars include, for example, sucrose, fructose, dextrose, honey, molasses, high fructose corn syrup, lactose, maltose, and maltose syrups.
  • the sweetener will be something which has a sweetness intensity about that of sucrose or fructose.
  • Sweeteners are generally added at a level of 0% to about 8%; preferably from about 1% to about 6%.
  • Artificial sweeteners such as aspartame, acesulfam, saccharine, cyclamate, and glycyrrhizin can also be used. The amount of artificial sweetener used would be that effective to produce the sweetness that is desired; and would be about the equivalent of the addition of from about 1% to 7% of sucrose.
  • Flavor enhancers including salt or salt substitutes such as potassium chloride, sodium chloride/potassium chloride mixtures, and seasoned salts can also be used. The level of flavor enhancer used is a matter of the desired taste level, but usually is from about 0.1% to about 2%.
  • Other flavorants include natural or artificial peanut flavors, roasted flavors, and praline/caramel flavors, walnut flavors, almond flavors and flavor compositions.
  • the process of the present invention can also employ nut chunks, and other flavored additives which can be mixed with the peanut spread.
  • additives include chocolate chips or bits or other flavored bits, e.g. butterscotch and peanuts, jellies, (either low calorie jellies or regular jelly or preserves), and praline nuts or other candies. These additives are usually added at a level of from about 1% to about 20% by weight. Nut chunks and flavored bits can contain fats and oils. Therefore, the addition of these materials can affect the fat content and the calorie level of the nut spread.
  • the process of the present invention involves as a first step depositing the hereinbefore described peanut paste into a mixing tank. Next, the solid ingredients are added to the mixing tank containing the peanut paste and the mixture of peanut paste and solid ingredients is passed through a high shear mixer. The temperature of the mixture is then adjusted so that the temperature of the nut paste exiting the homogenizer is less than 240°F. Next, the mixture is pumped through a homogenizer at a pressure ranging from about 9,000 psig to about 14,500 psig and then a colloid mill. Finally, the mixture is passed through a versator and a scraped wall heat exchanger.
  • Nut spreads prepared according to this process will have a monomodal or bimodal particle distribution such that at least 50% of the solids in the nut spread have a particle size of less than about 18 microns and at least 90% of the solids in the nut spread have a particle size of less than about 60 microns.
  • Nut spreads prepared according to the process of the present invention will further have a Casson plastic viscosity of from about 8 to about 17 poise and a Casson yield value of less than about 300 dynes/cm2.
  • step (B) the hereinbefore described peanut paste is deposited into a mixing tank such as a Hamilton kettle.
  • the peanut paste is then mixed as the solid ingredients are added as described hereinafter in step (B).
  • B. Mixing the solid ingredients into the tank containing the peanut paste and passing the resulting mixture through a high shear mixer
  • the solid ingredients are added to the mixing tank containing the peanut paste and mixed into the peanut paste.
  • the solid ingredients are typically added gradually over a time period ranging from about 15 to about 45 minutes. It may be desirable to add the corn syrup solids and the sugar and flavorants first, followed by the protein solids, particularly when making a crunchy peanut spread.
  • the mixture of peanut paste and solid ingredients is passed through a high shear mixer such as a colloid mill, and typically a heat exchanger, before proceeding with step (c) described hereinafter.
  • a high shear mixer such as a colloid mill, and typically a heat exchanger
  • step (c) described hereinafter.
  • a portion of the resulting mixture of peanut paste and solid ingredients is simultaneously recycled through a colloid mill and back into the mixing tank. This recycling is generally continued at least until all of the solids have been added.
  • the recycling is continued until the Casson plastic viscosity of the mixture of peanut paste and solids is in the range of from about 60 to about 70 poise. In any event, the Casson plastic viscosity of the mixture at this point in the process will exceed 30 poise.
  • step ( ⁇ ) Adjusting the temperature of the mixture such that the temperature exiting the homogenizer in step ( ⁇ ) will be less than about 240°F
  • step (b) causes the temperature of the mixture of peanut paste and solids to rise.
  • step (D) the temperature of the mixture exiting the homogenizer
  • step (D) exceeds 240°F
  • the nut spread will be very viscous due to unfolding, denaturation and oil absorption of the soy proteins as well as carmelization of the sucrose, molasses and corn syrup solids that occurs at these high temperatures. This makes the nut spread extremely difficult to process.
  • the temperature of the mixture as it exits the homogenizer in step (d) described hereinafter is less than about 240°F, the nut spread exiting the homogenizer will be desirably fluid and easy to process.
  • the temperature of the mixture before it enters the homogenizer should be adjusted to less than about 68.3°C to ensure that the temperature of the nut spread exiting the homogenizer does not exceed 240°F.
  • the temperature of the mixture entering the homogenizer is from about 65.5°C (150°F) to about 68.3°C (155°F).
  • the temperature of the mixture as it exits the homogenizer increases by about 60°F.
  • the temperature of the mixture can be adjusted to within the desired range by any of a number of conventional methods, e.g., the use of heat exchangers.
  • the mixture is pumped through a homogenizer, such as a Rannie Model 1351 homogenizer, at a pressure ranging from about 9,000 to about 14,500 psig.
  • a homogenizer such as a Rannie Model 1351 homogenizer
  • the pressure in the homogenizer ranges from about 11,000 to about 13,000 psig.
  • the pressure in the homogenizer is 12,000 psig.
  • the purpose of the homogenizer is to break down the particle size of the solids so that the solids will not impart an undesirable sensation of grittiness to the nut spread upon mastication.
  • the homogenizer also changes the particle size distribution of the spread from polymodal to monomodal or bimodal, which results in a lower viscosity for the final nut spread product.
  • the particle size distribution of the particles is such that at least about 50% of the solids have a particle size of less than about 18 microns, preferably less than 15 microns, more preferably less than 13 microns and at least about 90% of the solids have a particle size of less than about 60 microns, preferably less than about 52 microns, more preferably less than about 40 microns. Nut spreads in which at least 90% of the solids have a particle size of less than 60 microns will have a smooth texture (e.g., they will not be gritty).
  • a cell disruption valve can optionally be used in the homogenizer to achieve a higher particle size breakdown at lower pressures.
  • a heat exchanger may optionally be used after the homogenizer to cool the mixture before it reaches the colloid mill. Use of a heat exchanger can prevent flavor degradation and help to increase the efficiency of the colloid mill.
  • the homogenized mixture is pumped through a colloid mill such as a Greerco Colloid Mill to reduce the viscosity of the mixture.
  • a colloid mill such as a Greerco Colloid Mill to reduce the viscosity of the mixture.
  • the colloid mill is operated with a wide open gap at about 3600 rpm.
  • the nut spread is finished by passing the mixture through a versator and a scraped wall heat exchanger to increase the oxidative stability of the nut spread product and to set up the crystalline structure of the nut spread.
  • the scraped wall heat exchanger is typically operated such that the freezer outlet temperature is between 97 and 100°F. Chunks or pieces of full fat nuts may be added if desired.
  • Finished nut spreads prepared according to the process of the present invention will have a Casson plastic viscosity of from about 8 to about 17 poise, preferably from about 8 poise to about 15 poise, more preferably from about 8 poise to about 12 poise.
  • the product will further have a yield value of less than about 300 dynes per square centimeter, preferably less than about 250 dynes per square centimeter, more preferably less than about 225 dynes per square centimeter.
  • the particle size distribution of the product is monomodal or bi-modal. Preferably at least 50% of the solids in the nut spread have a particle size of less than
  • 18 microns preferably less than 15 microns, most preferably less than 13 microns and at least 90% of the solids have a particle size of less than 60 microns, preferably less than 52 microns, more preferably less than 40 microns.
  • the water insoluble solids present in the nut butters and spreads of the present invention have a bimodal particle size distribution such that from about 80% to about 87% of the water insoluble solids comprising the nut butter or paste have a particle size of less than about 21.6 microns, from about 75% to about 83% of the water insoluble solids comprising the nut butter or spread have a particle size of less than about 16.7 microns, from about 65% to about 73% of the water insoluble solids comprising the nut butter or spread have a particle size of less than about 13.0 microns, from about
  • 55% to about 60% of the water insoluble solids comprising the nut butter or spread have a particle size of less about 10.1 microns, from about 43% to about 50% of the water insoluble solids comprising the nut butter or spread have a particle size of less than about 7.9 microns and from about 25% to about 30% of the water insoluble solids comprising the nut butter or spread have a particle size of less than about 6.2 microns.
  • water insoluble solids means those solids present in the nut spread product which are capable of binding fats in more than one way.
  • water insoluble solids may bind fat onto their surface and/or may absorb fat into their interior.
  • Water insoluble solids present in the nut paste can include, for example, nut solids, protein from any grain or animal source, starches and fibers.
  • the nut spreads prepared according to the process of the present invention will have a total fat content of from about 25% to about 42%.
  • the nut spreads prepared according to the process of he present invention will have a total fat content ranging from about 28% to about 38%, more preferably from about 30% to about 36%, and most preferably from about 30% to about 32%.
  • Such nut spreads are fluid and have desirable texture (e.g., not gritty) and flavor.
  • a Brookfield Viscometer (HAT series), 5C4-13R chamber with a 8C4-27 spindle is used. This arrangement consists of a spindle "bob" of 0.465 inches (1.12 cm). The inner diameter of the sample cell is 0.750 inches (1.87 cm). The instrument is calibrated at 65°C and all samples are measured at 65°C.
  • a sample of 14.0 grams of nut spread (unaerated) is placed in the sample cell.
  • the sample cell is then inserted in the jacketed cell holder.
  • the water temperature entering the jacketed cell holder should be a few degrees higher than the desired sample temperature of 65°C.
  • the sample is pre-sheared for five minutes at 50 rpm.
  • the speed is then changed to 100 rpm and a measurement taken after the dial reading settles to a constant value.
  • a total of five scale readings are recorded for 100, 50, 20, 10 and 5 rpm.
  • the time before reading should be as set forth in Table I.
  • the dial reading and rpm are converted into shear stress and shear rate values by multiplying the rpm and dial reading by 0.34 and 17, respectively.
  • a plot of the square root of shear stress vs. the square root of shear rate results in a straight line.
  • the plastic viscosity which is equal to the slope of the line squared.
  • the plastic viscosity is a measurement of the nut spread's viscosity at an infinite shear rate. It accurately predicts the resistance to flow in pumping, moving or mixing situations.
  • the Casson plastic viscosity is measured in poise.
  • the second value is the yield value which is equal to the value of the x intercept
  • the yield value is a measure of amount of force or shear that is necessary to get the nut spread to start moving.
  • the yield value is measured in dynes per square centimeter. The relationship between the plastic viscosity and the yield value determine how a nut spread will behave in additional processing.
  • a Malvern 2600D particle size analyzer with an IBM PS/2 computer was used to analyze the particle size of the samples.
  • a small amount (about 0.01 grams) of its sample was placed in a 25 ml test tube and about 15 ml of acetone are added to it.
  • the sample is dispersed in the acetone by using a vortex mixer.
  • a transfer pipette is then used to add this diluted solution dropwise to the acetone filled cell of the analyzer.
  • the sample is added until the obscuration is 0.2 to 0.3.
  • the obscuration refers to the amount of light which is obscured by the sample because of diffraction and absorption.
  • the instrument reads more accurately when the obscuration is 0.05 to 0.5 and preferably from 0.2 to 0.3 (20% to 30% of the light energy is reduced).
  • the apparatus is fitted with a 100 mm lens to determine the particle size of the paste. Particle sizes from 0.5 to 188 microns can be measured using a 100 mm lens.
  • a magnetic stirrer is used to insure that the sample is being dispersed during the readings. Each sample is swept 250 times by the laser for each reading. Each sample was read a minimum of three times with a five (5) minute wait between each reading.
  • Example I describes a reduced fat peanut spread prepared by a continuous process employing a versator.
  • the ingredients used to prepare this peanut spread are as follows: Ineredient %
  • the peanuts are roasted at 422°F and blanched and ground in a Bauer Mill to form a peanut paste.
  • the peanut paste is then deposited into a 100 gallon Hamilton kettle.
  • the molasses, stabilizer, and emulsifier are added to the mixing tank which is held at a constant temperature of 140°F.
  • the solid ingredients corn syrup solids, salt and sugar are weighed into a
  • the solids are mixed at low speed for about 15 minutes and then loaded into a K-Tron T-35 Twin Screw feeder positioned over the mixing tank.
  • the corn syrup solids, sugar and salt are then added to the mixing tank at a constant rate over a time period of about 30 minutes. After these solids have been added, the soy protein solids are mixed in. Throughout the time that the solids are being added to the peanut paste in the mixing tank, a portion of the tank mixture is pumped through a 7.5 inch Greerco W-500 H Colloid Mill operated at a wide open gap and then redeposited in the mixing tank. After all of the solids have been added, the mixture continues to be recycled through the colloid mill until the Casson plastic viscosity is 65.9 poise. Next, the temperature of the mixture is adjusted to about 65.5° C.
  • the mixture is pumped through a Rannie homogenizer at a pressure of 12,000 psig and then a heat exchanger, a colloid mill and another heat exchanger. At this point the nut spread has a Casson plastic viscosity of about 16.1 poise and a yield value of 279.2 dynes per square centimeter.
  • the vitamins and minerals are added to the mixture, and the mixture is passed through a versator and a scraped wall heat exchanger.
  • the finished nut spread has a Casson plastic viscosity of about 12.5 poise and a yield value of 226.2 dynes per square centimeter.
  • the particle size distribution is near monomodal.
  • At least 50% of the solids in the nut spread have a particles size of less than 18 microns and at least 90% of the solids have a particle size of less than 60 microns.
  • This nut spread is fluid and has a smooth (nongritty texture) and desirable flavor.
  • the fat content of the nut spread is 34%.
  • Example II describes a reduced fat peanut spread prepared by a continuous process wherein the solid ingredients are continuously mixed in a twin screw mixing device, e.g., Readco mixer. No recycle stream is employed.
  • the ingredients used to prepare the peanut spread of Example II are the same as those used in Example I.
  • the peanut paste is prepared as in Example I and the solid ingredients are added all at once.
  • the mixture of peanut paste and solid ingredients is pumped through a 7.5 inch Greerco colloid mill operated at a wide open gap. Next, the temperature of the mixture is adjusted to about 65.5°C.
  • the mixture is pumped through a Rannie homogenizer at a pressure of 11,000 psig and then a heat exchanger, a colloid mill, another heat exchanger and a versator.
  • the nut spread has a Casson plastic viscosity of less than 17 poise and a yield value of less than 300 dynes per square centimeter.
  • the particle size distribution is near monomodal. At least 50% of the solids in the nut spread have a particles size of less than 18 microns and at least 90% of the solids have a particle size of less than 60 microns.
  • This nut spread is fluid and has a smooth (nongritty texture) and desirable flavor.
  • the fat content of the nut spread is 34%.

Abstract

A continuous process for preparing a high protein or low fat nut spread having desirable fluidity, texture and flavor. The process comprises as a first step depositing a nut paste in a mixing tank. Next, the solid ingredients which are to be present in the final product spread are mixed into the tank containing the peanut paste and the mixture is pumped through a high shear mixer. The temperature of the mixture is then adjusted so that the temperature of the mixture exiting the homogenizer is less than about 240 °F. The mixture is then pumped through a homogenizer at a pressure ranging from about 9,000 to about 14,500 psig, a colloid mill, a versator and a scraped wall heat exchanger. Nut spreads having a monomodal or bimodal particle size distribution such that at least 50 % of the solids in the nut spread have a particle size of less than 18 microns and 90 % of the solids in the nut spread have a particle size of less than 60 microns, and further having a Casson plastic viscosity of from about 8 to about 17 poise and a yield value of less thant about 300 dynes per square centimeter are produced according to this process.

Description

High protein and/or reduced fat nut spread and process for preparing 1t
FIELD OF THE INVENTION The present invention relates to a continuous process for adding solids to peanut paste that results in a fluid, nongritty nut spread having superior peanut flavor. Reduced fat peanut spreads having desirable fluidity and smooth texture can be prepared according to the continuous process of the present invention.
BACKGROUND OF THE INVENTION Conventional peanut and other nut butters or spreads consist of a mixture of solid nut particles, liquid oil, flavorants, e.g., a sweetener such as sugar, high fructose corn syrup or honey, and salt, and a stabilizer. Peanut butters typically contain about 50% oil and about 50% solids. Peanut butters containing these levels of solids and oil have good texture, spreadability and flavor.
For some applications, however, it is desirable to have a peanut spread which contains higher levels of solids. This may be the case, for example, when a high protein and/or reduced fat nut spread is desired. High protein and/or reduced fat nut spreads are typically prepared by increasing the level of solid ingredients present in the final product relative to the level of oil. Reduced fat peanut spreads, for example, typically comprise from about 58% to about 75% solids and from about 25% to about 42% oil.
Unfortunately, increasing the level of solids in the nut spread relative to the level of oil can have deleterious effects on the quality of the nut spread. For example, increasing the level of solids in a nut spread can increase the viscosity of the spread such that the spread is undesirably stiff (e.g., nonfluid). Indeed, spreadability or fluidity is highly sensitive to the oil content of the nut spread; the lower the oil content, the harder the product is to spread. The addition of non-nut solids also reduces the fluidity of the nut spread by creating a polymodal particle size distribution for the finished nut spread (reduced fat nut spreads desirably have a monomodal or bimodal particle size distribution). Increasing the level of solids in a nut spread relative to the level of oil can also adversely impact the texture of the nut spread. The solid particles create an undesirable sensation of grittiness upon mastication of the nut spread. Lastly, increasing the level of solids in a nut spread can adversely affect the flavor of the nut spread by diluting the peanut flavor.
Past attempts to provide nut spreads which have the combination of desirable fluidity, smooth texture and desirable flavor but which contain a high level of solids (e.g., greater than about 58%) have not been wholly successful. Efforts to reduce grittiness have resulted in a high viscosity spread. Moreover, attempts to reduce viscosity have resulted in nut spreads with less flavor compared to full fat peanut butters. A process taught by Wong et al. utilized a roll milling operation to prepare defatted peanut solids for use in a low fat peanut spread. See U.S. Patent 5,079,027 issued January 7, 1992. Another process taught by Walling et al utilizes extrusion roasting or a combination of roll milling and high shear mixing to prepare defatted peanut solids to be combined with undefatted peanuts in the preparation of a low fat peanut spread. See U. S. Patent 5,230,919 issued July 27, 1993. The use of defatted peanuts and intense processing conditions in these processes resulted in peanut spreads with inferior flavor compared to full fat peanut butters. Moreover, the roll milling and extrusion roasting processes taught by Wong et al. and Walling et al. are relatively capital intensive for a peanut manufacturing operation.
It is therefore an object of the present invention to provide a continuous process for preparing high protein and/or reduced fat nut spreads which have desirable texture (e.g., are not gritty) and fluidity and which have a nut flavor comparable to that of conventional full fat nut butters.
Co-pending U.S. Patent Application Serial No. 08/136,524 (Wong et al), filed October 14, 1993, also discloses a process for preparing high protein and/or reduced fat nut spreads which have desirable texture and fluidity and which have a nut flavor comparable to conventional full fat nut spreads. The process of the present invention is an improvement over the prior Wong process in several ways. First, the process of the present invention does not require that the Casson plastic viscosity of the nut spread mixture be adjusted to less than 30 poise before being pumped through the homogenizer. Instead, the homogenizer is operated at higher pressures (between 9,000 and 14,500 psig compared to less than 8,000 psig in the prior application). This make the processing of the nut spread easier and less costly. Second, the mechanism for preparing the nut butters is different. In the prior Wong application, the viscosity of the nut butter actually rose after homogenization. This does not occur in the process of the present invention because of the higher solids concentration during homogenization (higher particle to particle sharing). Also, the cooling step of the process of the present invention contributes to certain flavor benefits that are recognized in nut spreads prepared according to the process of the present invention (e.g., gets rid of any off flavor that might otherwise result).
SUMMARY OF THE INVENTION * The present invention relates to a continuous process for preparing a high protein or low fat nut spread having desirable fluidity, texture and flavor. The process comprises as a first step depositing a nut paste in a mixing tank (step a). Next, the solid ingredients which are to be present in the final product spread are mixed into the tank containing the peanut paste and the mixture of peanut paste and solid ingredients is passed through a high shear mixer (step b). The temperature of the mixture is then adjusted such that the temperature of the nut paste exiting the homogenizer in step (d) is less than 240°F (step c). This mixture is then pumped through a homogenizer at a pressure ranging from about 9,000 to about 14,500 psig (step d), a colloid mill (step e) and finally a versator and a scraped wall heat exchanger (step f). The nut spread product has a monomodal or bimodal particle size distribution such that at least 50% of the solids in the nut spread have a particle size of less than 18 microns and 90% of the solids in the nut spread have a particle size of less than 60 microns, a Casson plastic viscosity of from about 8 to about 17 poise and a Casson yield value of less than about 300 dynes per square centimeter.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous process for preparing high protein and/or low fat nut spreads having desirable fluidity, texture and flavor. The term "nut spread" as used herein means a spreadable food product made from nut solids and oil. Nut spreads typically contain from about 58% to about 75% solids and from about 25% to about 42% oil or fat. The remainder of the nut spread comprises additives such as sweeteners, stabilizers, flavoring agents, proteins and non-nutritive bulking agents. The process of the present invention is particularly suitable for preparing low fat (25% to 42% total fat) peanut spreads.
The materials used in the process of the present invention, the steps of the process, and products prepared according to the process are described in detail as follows: I. Process Materials
The materials used in the process of the present invention include nut paste and solid ingredients, as well as other optional ingredients.
A. Nut paste The process of the present invention utilizes a nut paste, preferably peanut paste, as a starting material. While this invention will be generally described in terms of peanuts and peanut paste, it should be readily apparent that other materials such as almonds, pecans, walnuts, cashews, filberts, macadamia nuts, brazilians, sunflower seeds, sesame seeds, pumpkin seeds and soybeans could be used to form the nut paste utilized in the process of the present invention. The term "nut" as used herein encompasses these nuts and seeds. Mixtures of these nuts and oil seeds can also be used.
The nut paste can be formed by any of a number of known methods. For example, the nuts can be roasted and then ground in a conventional grinder or mill such as a Bauer mill to produce a nut paste of pumpable consistency. The nut paste may optionally be defatted or the particle size of the nut solids of the nut paste may be reduced. See, for example Wong et al.; U.S. Patent 5,097,027; Issued January 7, 1992, herein incorporated by reference.
The nut paste will typically comprise from about 50% to about 90% of the nut spread. Preferably, the nut paste will comprise form about 50% to about 85% of the nut spread. More preferably, the nut paste will comprise from about 55% to about 65% of the nut spread.
B. Solid ingredients
The process of the present invention also utilizes solid ingredients as a starting material. The solid ingredients used to prepare fluid, nongritty, nut spreads by the process of this invention can include, for example; diluents such as corn syrup solids, maltodextrin, dextrose, polydextrose, fiber, mono- and disaccharides, starches (e.g., corn, potato, wheat) and flours (e.g., wheat, rye, pea); protein supplements such as additional peanut solids, soy flour, soy concentrate, soy isolate, casein, egg whites, and protein from other animal or vegetable sources; or a combination of the above.
The solid ingredients which are added to the nut paste typically comprise from about 13% to about 50% of the nut spread. Preferably, the solid ingredients comprise from about 38% to about 45% of the nut spread. More preferably, the solid ingredients comprise form about 32% to about 43% of the nut spread. C. Other Optional Ingredients
In addition to the nut paste and the solid ingredients described hereinabove, the process of the present invention may optionally utilize other ingredients. For example, low calorie oils and zero calorie oils such as sucrose polyesters of long chain fatty acids (olestra) and other polyol polyesters of fatty acids can be used (see for example U. S. Pat. Nos. 3,600,186 to Mattson, et al. and 4,005,196 to Jandacek). Mixed triglycerides made from medium and long chain saturated and/or unsaturated fatty acids can also be used herein. An oil which contains at least 10% medium chain triglycerides can also be used. Medium chain triglycerides contain saturated fatty acids having from six to twelve carbon atoms. Reduced calorie peanut butters containing medium chain triglycerides are described in U. S. Pat. No. 4,863,753 (Hunter, et al., 1989). The nut spread prepared according to the process of the present invention may also optionally contain a stabilizer. The stabilizer can be any of the known peanut butter stabilizers, for example, hydrogenated rapeseed oil, or other hydrogenated triglycerides having a high proportion of C20 and C22 fatty acids. (See for example, U. S. Pat. No. 3,597,230 and U. S. Pat. No. 3,192,102.) Stabilizers are usually triglycerides which are solid at room temperature. They solidify in the nut butter in specific crystalline states and keep the oil from separating. These materials can be mixed with a second hydrogenated oil having an iodine value of less than 8, for example hydrogenated palm oil, canola oil, soybean oil, cottonseed oil, coconut oil, and similar materials. This stabilizer can also be mixed with lower melting fat fractions as, for example, the peanut butter stabilizer composition disclosed in U. S. Pat. No. 4,341,814 (1982).
In addition to the stabilizer, or in lieu thereof, an emulsifier can be used in the process of the present invention. The emulsifier can be any food compatible emulsifier such as mono- and di-glycerides, lecithin, sucrose monoesters, polyglycerol esters, sorbitan esters, polyethoxylated glycerols and mixtures thereof. Up to about 3% and preferably from 1% to 3% stabilizer or emulsifier is used.
The process described herein can also optionally utilize flavorants. "Flavorants," as the term is used herein, are agents which contribute to or enhance the flavor of the nut butter. These include sweeteners, flavor enhancers, artificial sweeteners, natural and artificial flavors, flavored or candied bits, nut chunks and other additives which contribute to the flavor of the spread. Sweeteners are selected from the group consisting of sugars, sugar mixtures, artificial sweeteners and other naturally sweet materials. Sugars include, for example, sucrose, fructose, dextrose, honey, molasses, high fructose corn syrup, lactose, maltose, and maltose syrups. Preferably, the sweetener will be something which has a sweetness intensity about that of sucrose or fructose. Sweeteners are generally added at a level of 0% to about 8%; preferably from about 1% to about 6%. Artificial sweeteners such as aspartame, acesulfam, saccharine, cyclamate, and glycyrrhizin can also be used. The amount of artificial sweetener used would be that effective to produce the sweetness that is desired; and would be about the equivalent of the addition of from about 1% to 7% of sucrose. Flavor enhancers including salt or salt substitutes such as potassium chloride, sodium chloride/potassium chloride mixtures, and seasoned salts can also be used. The level of flavor enhancer used is a matter of the desired taste level, but usually is from about 0.1% to about 2%. Other flavorants include natural or artificial peanut flavors, roasted flavors, and praline/caramel flavors, walnut flavors, almond flavors and flavor compositions.
The process of the present invention can also employ nut chunks, and other flavored additives which can be mixed with the peanut spread. These additives include chocolate chips or bits or other flavored bits, e.g. butterscotch and peanuts, jellies, (either low calorie jellies or regular jelly or preserves), and praline nuts or other candies. These additives are usually added at a level of from about 1% to about 20% by weight. Nut chunks and flavored bits can contain fats and oils. Therefore, the addition of these materials can affect the fat content and the calorie level of the nut spread.
II. Process steps The process of the present invention involves as a first step depositing the hereinbefore described peanut paste into a mixing tank. Next, the solid ingredients are added to the mixing tank containing the peanut paste and the mixture of peanut paste and solid ingredients is passed through a high shear mixer. The temperature of the mixture is then adjusted so that the temperature of the nut paste exiting the homogenizer is less than 240°F. Next, the mixture is pumped through a homogenizer at a pressure ranging from about 9,000 psig to about 14,500 psig and then a colloid mill. Finally, the mixture is passed through a versator and a scraped wall heat exchanger. Nut spreads prepared according to this process will have a monomodal or bimodal particle distribution such that at least 50% of the solids in the nut spread have a particle size of less than about 18 microns and at least 90% of the solids in the nut spread have a particle size of less than about 60 microns. Nut spreads prepared according to the process of the present invention will further have a Casson plastic viscosity of from about 8 to about 17 poise and a Casson yield value of less than about 300 dynes/cm2. Each of the basic steps of the process of the present invention is described in detail as follows: A. Depositing the peanut paste into mixing tank
As a first process step, the hereinbefore described peanut paste is deposited into a mixing tank such as a Hamilton kettle. The peanut paste is then mixed as the solid ingredients are added as described hereinafter in step (B). B. Mixing the solid ingredients into the tank containing the peanut paste and passing the resulting mixture through a high shear mixer
In a second process step, the solid ingredients are added to the mixing tank containing the peanut paste and mixed into the peanut paste. The solid ingredients are typically added gradually over a time period ranging from about 15 to about 45 minutes. It may be desirable to add the corn syrup solids and the sugar and flavorants first, followed by the protein solids, particularly when making a crunchy peanut spread.
The mixture of peanut paste and solid ingredients is passed through a high shear mixer such as a colloid mill, and typically a heat exchanger, before proceeding with step (c) described hereinafter. In a preferred embodiment, as the solid ingredients are gradually added, a portion of the resulting mixture of peanut paste and solid ingredients is simultaneously recycled through a colloid mill and back into the mixing tank. This recycling is generally continued at least until all of the solids have been added.
Typically, but not necessarily, the recycling is continued until the Casson plastic viscosity of the mixture of peanut paste and solids is in the range of from about 60 to about 70 poise. In any event, the Casson plastic viscosity of the mixture at this point in the process will exceed 30 poise.
C. Adjusting the temperature of the mixture such that the temperature exiting the homogenizer in step (ά) will be less than about 240°F
The mixing and colloid milling employed in step (b) described hereinabove causes the temperature of the mixture of peanut paste and solids to rise. When the temperature of the mixture exiting the homogenizer (described hereinafter in step (D)) exceeds 240°F, the nut spread will be very viscous due to unfolding, denaturation and oil absorption of the soy proteins as well as carmelization of the sucrose, molasses and corn syrup solids that occurs at these high temperatures. This makes the nut spread extremely difficult to process. However, if the temperature of the mixture as it exits the homogenizer in step (d) described hereinafter is less than about 240°F, the nut spread exiting the homogenizer will be desirably fluid and easy to process.
When the homogenizer is operated at a pressure of 12,000 psig, the temperature of the mixture before it enters the homogenizer should be adjusted to less than about 68.3°C to ensure that the temperature of the nut spread exiting the homogenizer does not exceed 240°F. Preferably, when the homogenizer is operated at a pressure of 12,000 psig, the temperature of the mixture entering the homogenizer is from about 65.5°C (150°F) to about 68.3°C (155°F). In general, for every 1000 psig increase in pressure, the temperature of the mixture as it exits the homogenizer increases by about 60°F. The temperature of the mixture can be adjusted to within the desired range by any of a number of conventional methods, e.g., the use of heat exchangers.
D. Pumping the mixture containing the peanut paste and the solid ingredients through a homogenizer at a pressure ranging from about 9.000 to about 14.500 psig
After the temperature of the mixture has been adjusted as described hereinabove in step (c), the mixture is pumped through a homogenizer, such as a Rannie Model 1351 homogenizer, at a pressure ranging from about 9,000 to about 14,500 psig. Preferably, the pressure in the homogenizer ranges from about 11,000 to about 13,000 psig. Most preferably, the pressure in the homogenizer is 12,000 psig. The purpose of the homogenizer is to break down the particle size of the solids so that the solids will not impart an undesirable sensation of grittiness to the nut spread upon mastication. The homogenizer also changes the particle size distribution of the spread from polymodal to monomodal or bimodal, which results in a lower viscosity for the final nut spread product.
After homogenization the particle size distribution of the particles is such that at least about 50% of the solids have a particle size of less than about 18 microns, preferably less than 15 microns, more preferably less than 13 microns and at least about 90% of the solids have a particle size of less than about 60 microns, preferably less than about 52 microns, more preferably less than about 40 microns. Nut spreads in which at least 90% of the solids have a particle size of less than 60 microns will have a smooth texture (e.g., they will not be gritty). A cell disruption valve can optionally be used in the homogenizer to achieve a higher particle size breakdown at lower pressures.
A heat exchanger may optionally be used after the homogenizer to cool the mixture before it reaches the colloid mill. Use of a heat exchanger can prevent flavor degradation and help to increase the efficiency of the colloid mill.
E. Pumping the homogenized mixture through a colloid mill
Next, the homogenized mixture is pumped through a colloid mill such as a Greerco Colloid Mill to reduce the viscosity of the mixture. Typically, the colloid mill is operated with a wide open gap at about 3600 rpm. F. Passing the homogenized, colloid milled mixture through a versator and a scraped wall heat exchanger
Finally, the nut spread is finished by passing the mixture through a versator and a scraped wall heat exchanger to increase the oxidative stability of the nut spread product and to set up the crystalline structure of the nut spread. The scraped wall heat exchanger is typically operated such that the freezer outlet temperature is between 97 and 100°F. Chunks or pieces of full fat nuts may be added if desired.
Finished nut spreads prepared according to the process of the present invention will have a Casson plastic viscosity of from about 8 to about 17 poise, preferably from about 8 poise to about 15 poise, more preferably from about 8 poise to about 12 poise. The product will further have a yield value of less than about 300 dynes per square centimeter, preferably less than about 250 dynes per square centimeter, more preferably less than about 225 dynes per square centimeter.
The particle size distribution of the product is monomodal or bi-modal. Preferably at least 50% of the solids in the nut spread have a particle size of less than
18 microns, preferably less than 15 microns, most preferably less than 13 microns and at least 90% of the solids have a particle size of less than 60 microns, preferably less than 52 microns, more preferably less than 40 microns.
In an especially preferred embodiment of the present invention, the water insoluble solids present in the nut butters and spreads of the present invention have a bimodal particle size distribution such that from about 80% to about 87% of the water insoluble solids comprising the nut butter or paste have a particle size of less than about 21.6 microns, from about 75% to about 83% of the water insoluble solids comprising the nut butter or spread have a particle size of less than about 16.7 microns, from about 65% to about 73% of the water insoluble solids comprising the nut butter or spread have a particle size of less than about 13.0 microns, from about
55% to about 60% of the water insoluble solids comprising the nut butter or spread have a particle size of less about 10.1 microns, from about 43% to about 50% of the water insoluble solids comprising the nut butter or spread have a particle size of less than about 7.9 microns and from about 25% to about 30% of the water insoluble solids comprising the nut butter or spread have a particle size of less than about 6.2 microns.
As used herein, "water insoluble solids" means those solids present in the nut spread product which are capable of binding fats in more than one way. For example, water insoluble solids may bind fat onto their surface and/or may absorb fat into their interior. Water insoluble solids present in the nut paste can include, for example, nut solids, protein from any grain or animal source, starches and fibers. The nut spreads prepared according to the process of the present invention will have a total fat content of from about 25% to about 42%. Preferably, the nut spreads prepared according to the process of he present invention will have a total fat content ranging from about 28% to about 38%, more preferably from about 30% to about 36%, and most preferably from about 30% to about 32%. Such nut spreads are fluid and have desirable texture (e.g., not gritty) and flavor.
ANALYTICAL TEST METHODS A number of parameters used to characterize elements of the present invention are quantified by particular experimental analytical procedures. Each of these procedures is described in detail as follows:
1. Casson Plastic Viscosity and Casson Yield Value and Nut Spread
A Brookfield Viscometer (HAT series), 5C4-13R chamber with a 8C4-27 spindle is used. This arrangement consists of a spindle "bob" of 0.465 inches (1.12 cm). The inner diameter of the sample cell is 0.750 inches (1.87 cm). The instrument is calibrated at 65°C and all samples are measured at 65°C.
A sample of 14.0 grams of nut spread (unaerated) is placed in the sample cell. The sample cell is then inserted in the jacketed cell holder. To compensate for heat losses through the tubings, etc., the water temperature entering the jacketed cell holder should be a few degrees higher than the desired sample temperature of 65°C. After the temperature of the sample has reached 65°C the sample is pre-sheared for five minutes at 50 rpm. The speed is then changed to 100 rpm and a measurement taken after the dial reading settles to a constant value. A total of five scale readings are recorded for 100, 50, 20, 10 and 5 rpm. In general, the time before reading should be as set forth in Table I.
Table 1
Time Before Reading
RPM (Seconds)
100 3
50 6
20 15
10 30
5 60 The dial reading and rpm are converted into shear stress and shear rate values by multiplying the rpm and dial reading by 0.34 and 17, respectively. A plot of the square root of shear stress vs. the square root of shear rate results in a straight line.
Readings where the dial pointer goes off scale are ignored. A least squares linear regression is made over the data to calculate the slope and intercept.
This data is used to calculate two values. The first of these is the plastic viscosity which is equal to the slope of the line squared. The plastic viscosity is a measurement of the nut spread's viscosity at an infinite shear rate. It accurately predicts the resistance to flow in pumping, moving or mixing situations. The Casson plastic viscosity is measured in poise.
The second value is the yield value which is equal to the value of the x intercept
(abscissa) squared. The yield value is a measure of amount of force or shear that is necessary to get the nut spread to start moving. The yield value is measured in dynes per square centimeter. The relationship between the plastic viscosity and the yield value determine how a nut spread will behave in additional processing.
2. Particle Size Analysis
A Malvern 2600D particle size analyzer with an IBM PS/2 computer was used to analyze the particle size of the samples. A small amount (about 0.01 grams) of its sample was placed in a 25 ml test tube and about 15 ml of acetone are added to it. The sample is dispersed in the acetone by using a vortex mixer. A transfer pipette is then used to add this diluted solution dropwise to the acetone filled cell of the analyzer. The sample is added until the obscuration is 0.2 to 0.3. The obscuration refers to the amount of light which is obscured by the sample because of diffraction and absorption. The instrument reads more accurately when the obscuration is 0.05 to 0.5 and preferably from 0.2 to 0.3 (20% to 30% of the light energy is reduced).
The apparatus is fitted with a 100 mm lens to determine the particle size of the paste. Particle sizes from 0.5 to 188 microns can be measured using a 100 mm lens. A magnetic stirrer is used to insure that the sample is being dispersed during the readings. Each sample is swept 250 times by the laser for each reading. Each sample was read a minimum of three times with a five (5) minute wait between each reading.
EXAMPLES Example I
Example I describes a reduced fat peanut spread prepared by a continuous process employing a versator. The ingredients used to prepare this peanut spread are as follows: Ineredient %
Peanuts 61.00
Molasses, Salt and Sugar 8.50
CBC Stablizer and Emulsifier 1.95
Soy Protein Isolate 5.00
Corn Syrup Solids 23.42
Vitamins/Minerals 0.14
The peanuts are roasted at 422°F and blanched and ground in a Bauer Mill to form a peanut paste. The peanut paste is then deposited into a 100 gallon Hamilton kettle. The molasses, stabilizer, and emulsifier are added to the mixing tank which is held at a constant temperature of 140°F. The solid ingredients ( corn syrup solids, salt and sugar) are weighed into a
Hobart Mixing Bowl. The solids are mixed at low speed for about 15 minutes and then loaded into a K-Tron T-35 Twin Screw feeder positioned over the mixing tank.
The corn syrup solids, sugar and salt are then added to the mixing tank at a constant rate over a time period of about 30 minutes. After these solids have been added, the soy protein solids are mixed in. Throughout the time that the solids are being added to the peanut paste in the mixing tank, a portion of the tank mixture is pumped through a 7.5 inch Greerco W-500 H Colloid Mill operated at a wide open gap and then redeposited in the mixing tank. After all of the solids have been added, the mixture continues to be recycled through the colloid mill until the Casson plastic viscosity is 65.9 poise. Next, the temperature of the mixture is adjusted to about 65.5° C. The mixture is pumped through a Rannie homogenizer at a pressure of 12,000 psig and then a heat exchanger, a colloid mill and another heat exchanger. At this point the nut spread has a Casson plastic viscosity of about 16.1 poise and a yield value of 279.2 dynes per square centimeter. The vitamins and minerals are added to the mixture, and the mixture is passed through a versator and a scraped wall heat exchanger.
The finished nut spread has a Casson plastic viscosity of about 12.5 poise and a yield value of 226.2 dynes per square centimeter. The particle size distribution is near monomodal. At least 50% of the solids in the nut spread have a particles size of less than 18 microns and at least 90% of the solids have a particle size of less than 60 microns. This nut spread is fluid and has a smooth (nongritty texture) and desirable flavor. The fat content of the nut spread is 34%.
Example II
Example II describes a reduced fat peanut spread prepared by a continuous process wherein the solid ingredients are continuously mixed in a twin screw mixing device, e.g., Readco mixer. No recycle stream is employed. The ingredients used to prepare the peanut spread of Example II are the same as those used in Example I. The peanut paste is prepared as in Example I and the solid ingredients are added all at once. After the solids are added the mixture of peanut paste and solid ingredients is pumped through a 7.5 inch Greerco colloid mill operated at a wide open gap. Next, the temperature of the mixture is adjusted to about 65.5°C. The mixture is pumped through a Rannie homogenizer at a pressure of 11,000 psig and then a heat exchanger, a colloid mill, another heat exchanger and a versator. The nut spread has a Casson plastic viscosity of less than 17 poise and a yield value of less than 300 dynes per square centimeter. The particle size distribution is near monomodal. At least 50% of the solids in the nut spread have a particles size of less than 18 microns and at least 90% of the solids have a particle size of less than 60 microns. This nut spread is fluid and has a smooth (nongritty texture) and desirable flavor. The fat content of the nut spread is 34%.

Claims

WHAT IS CLAIMED IS:
1. A process for preparing a high protein and/or a low fat nut spread characterized by desirable fluidity, texture and flavor, which process comprises the steps of: a) depositing nut paste in a mixing tank; b) mixing the solid ingredients into the nut paste to form a mixture and passing the mixture through a high shear mixer; c) adjusting the temperature of the mixture so that the temperature of the mixture as it exits a homogenizer in step (d) is less than 115°C; d) pumping the mixture through a homogenizer at a pressure ranging from 9,000 to 14,500 psig; e) pumping the mixture through a colloid mill; and f) pumping the mixture through a versator and a scraped wall heat exchanger to provide a nut spread having a monomodal or bimodal particle size distribution such that at least 50% of the solids have a particle size of less than 18 microns and 90% of the solids have a particle size of less than 60 microns, and further having a Casson plastic viscosity of from 8 to 17 poise; and a yield value of less than 300 dynes per square centimeter.
2. A process according to Claim 1 wherein the high shear mixed used in step (b) is a colloid mill.
3. A process for making a high protein and or low/fat nut spread characterized by desirable fluidity, texture and flavor, which process comprises the steps of: a) depositing nut paste in a mixing tank; b) mixing solid ingredients into the nut paste to form a mixture and simultaneously recycling a portion of the mixture through a colloid mill and back into the mixing tank; c) adjusting the temperature of the mixture so that the temperature of the mixture exiting a homogenizer in step (d) will be less than 115°C; d) pumping the tank mixture through the homogenizer at a pressure ranging from 9,000 to 14,500 psig; e) pumping the mixture through a colloid mill; and f) pumping the mixture through a versator and a scraped wall heat exchanger to produce a nut spread having a Casson plastic viscosity of from 8 to 7 poise and a yield value of less than 300 dynes/cm2, and a monomodal or bimodal particle size distribution such that at least 50% of the solids in the nut spread have a particle size of less than 18 microns and at least 90% of the solids in the nut spread have a particle size of less than 60 microns.
4. A process according to Claim 1 or 3 wherein the total fat content of the nut spread ranges from 28% to 38%.
5. A process according to Claim 2 or 4 wherein the homogenized mixture of peanut paste is pumped through a heat exchanger before being pumped through the colloid mill in step (e).
6. A process according to Claim 5 wherein the solid ingredients are added over a time period ranging from 15 to 45 minutes in step (b).
7. A process According to Claim 6 wherein in step (b) the mixture is recycled through the colloid mill until the mixture has a Casson plastic viscosity ranging from 60 poise to 70 poise.
8. A process according to Claim 7 wherein in step (c) the mixture is cooled to a temperature ranging from 65.5°C to 68.3°C.
9. A low fat bimodal nut spread characterized by desirable fluidity, texture and flavor and which comprises: a) from 50% to 90% of a nut paste; b) from 13% to 50% of solid ingredients; c) from 0% to 3% stabilizer; d) from 0% to 3% emulsifier; and e) from 0% to 8% flavorant; wherein the nut butter or nut spread product has i) a Casson plastic viscosity ranging from 8 to 17 poise; ii) a yield value of less than 300 dynes per square centimeter; and iii) a bimodal particle size distribution such that from 80% to 87% of the water insoluble solids comprising the nut butter or spread have a particle size than 21.6 microns, from 75% to 83% of the water insoluble solids comprising the nut butter or spread have a particle size of less than 16.7 microns, from 65% to 73% of the water insoluble solids comprising the nut spread have a particle size of less than 13.0 microns, from 55% to 60% of the water insoluble solids comprising the nut butter or spread have a particle size of less than 10.1 microns, from 43% to 50% of the water insoluble solids comprising the nut butter or spread have a particle size of less than 7.9 microns and from 25% to 30% of the water insoluble solids comprises the nut butter or spread have a particle size of less than 6.2 microns.
10. The low-fat bimodal nut spread of Claim 9 wherein the Casson plastic viscosity of the nut spread ranges from 8 to 12 poise.
PCT/US1995/004027 1994-05-17 1995-04-07 High protein and/or reduced fat nut spread and process for preparing it WO1995031116A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
MX9605563A MX9605563A (en) 1995-03-23 1995-04-07 High protein and/or reduced fat nut spread and process for preparing it.
AU22354/95A AU2235495A (en) 1994-05-17 1995-04-07 High protein and/or reduced fat nut spread and process for preparing it
EP95915488A EP0804092B1 (en) 1994-05-17 1995-04-07 High protein and/or reduced fat nut spread and process for preparing it
CA002189746A CA2189746C (en) 1994-05-17 1995-04-07 High protein and/or reduced fat nut spread and process for preparing it
DE69514687T DE69514687T2 (en) 1994-05-17 1995-04-07 PROTEIN-BASED AND / OR LOW-FAT NUT BREAD COAT AND METHOD FOR THE PRODUCTION THEREOF
JP52963695A JP3664257B2 (en) 1994-05-17 1995-04-07 High protein and / or low fat nut spread and method for producing the same
AT95915488T ATE188845T1 (en) 1994-05-17 1995-04-07 HIGH PROTEIN AND/OR LOW FAT NUT BREAD SPREAD AND METHOD FOR PRODUCING IT

Applications Claiming Priority (4)

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US24508494A 1994-05-17 1994-05-17
US08/245,084 1994-05-17
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996021364A1 (en) * 1995-01-12 1996-07-18 The Procter & Gamble Company Monomodal nut butters and spreads which have superior fluidity, texture and flavor
WO2014100017A1 (en) * 2012-12-17 2014-06-26 Living Healthy World LLC Methods for preparing and compositions comprising plant-based omega-3 fatty acids

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5714193A (en) * 1996-09-05 1998-02-03 The Procter & Gamble Co. Adding oil to nut paste prior to homogenization to reduce viscosity and stickiness without loss of nut flavor
US5667838A (en) * 1996-09-05 1997-09-16 The Procter & Gamble Company Separately milling nut solids and particulate water soluble solids to reduce stickiness and improve flavor intensity of nut spreads
US6040503A (en) 1997-09-02 2000-03-21 Appropriate Engineering And Manufacturing Bean-nut popping beans
US5942275A (en) * 1997-10-27 1999-08-24 The Procter & Gamble Company Flavored nut spreads having milk chocolate flavor and creamy soft texture
US5885646A (en) 1997-10-27 1999-03-23 The Procter & Gamble Company Process for making flavored nut spreads having relatively high sugar levels by using fluid suspension of sugar and oil
FR2771259B1 (en) * 1997-11-21 2000-01-28 Nutriset COMPLETE FOOD OR NUTRITIONAL SUPPORT, STABLE AGAINST OXIDATION, WITH HIGH ENERGY VALUE, LOW OSMOLALITY, LOW WATER CONTENT, PROCESS FOR PREPARING SAME AND USES THEREOF
US20010012532A1 (en) * 1999-09-24 2001-08-09 Smucker Acquisition, Inc. Sealed crustless sandwich
WO1999045789A1 (en) 1998-03-12 1999-09-16 Mars, Inc. Rheologically modified confectioneries produced by employing particular particle size distributions
US6063430A (en) * 1998-06-15 2000-05-16 The Procter & Gamble Company Blended nut spread compositions and method of making
US6706311B2 (en) 2000-03-29 2004-03-16 The Procter & Gamble Co. Low fat nut spread composition with high protein and fiber
US6548103B2 (en) 2000-03-29 2003-04-15 The Procter & Gamble Co. Process for making low fat nut spread composition with high protein and fiber
US6793956B2 (en) 2000-10-23 2004-09-21 The Procter & Gamble Co. Low-moisture, reduced fat, lipid-based fillings
US6743458B2 (en) 2000-10-23 2004-06-01 The Procter + Gamble Co. Reduced fat lipid-based fillings
US20020098267A1 (en) * 2000-10-23 2002-07-25 The Procter & Gamble Co. Filled snacks
US6720021B2 (en) * 2000-10-23 2004-04-13 The Procter + Gamble Co. Process for making a low-fat nut spread composition
CA2356035A1 (en) * 2001-03-02 2002-09-02 The J.M. Smucker Company Method and apparatus for making commercial crustless sandwiches and the crustless sandwiches made thereby
US20030008037A1 (en) * 2001-07-05 2003-01-09 The J.M. Smucker Company Frozen sandwich and method of making same
US20030008038A1 (en) * 2001-07-05 2003-01-09 The J.M. Smucker Company, An Ohio Corporation Frozen crustless sliced sandwich and method and apparatus for making same
US20030211223A1 (en) * 2002-05-10 2003-11-13 Unilever Bestfoods N.A. Nut butter
US20030211224A1 (en) * 2002-05-10 2003-11-13 Unilever Bestfoods N.A. Squeezable peanut butter
US20040208962A1 (en) * 2003-04-15 2004-10-21 The J.M. Smucker Company, An Ohio Corporation High protein peanut butter and jelly sandwich and method of making the same
US7498050B2 (en) * 2003-12-15 2009-03-03 Kraft Foods Global Brands Llc Edible spread composition and packaged product
US20090263562A1 (en) * 2008-04-22 2009-10-22 Robert Anthony Canastro Process for making nut spreads
CN104256745A (en) * 2014-09-02 2015-01-07 福建省莆田市健康树食品有限公司 Fruit and peanut sauce and preparation method of fruit and peanut sauce
US10045553B2 (en) 2014-12-18 2018-08-14 Mark H. Sterner Legume/grain based food product with prebiotic/probiotic source
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CA3170711A1 (en) 2020-02-07 2021-08-12 General Mills, Inc. High protein food

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619207A (en) * 1969-08-14 1971-11-09 Procter & Gamble Peanut butter containing homogenized peanut paste
US4062986A (en) * 1973-12-06 1977-12-13 Gerber Products Company Method for preparing sweetened, storage stable, chunky peanut spread and product thereof
EP0381259A2 (en) * 1989-01-30 1990-08-08 The Procter & Gamble Company Improved nut butter and nut solid milling process
WO1992020243A1 (en) * 1991-05-10 1992-11-26 The Procter & Gamble Company Improved fluid, reduced fat peanut butters and improved whipped peanut butters
US5230919A (en) * 1991-05-10 1993-07-27 The Procter & Gamble Company Composition and process of making fluid, reduced fat peanut butters and improved whipped peanut butters
US5366754A (en) * 1993-06-22 1994-11-22 Kraft General Foods, Inc. Reduced fat peanut butter product and method of making

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3317325A (en) * 1964-10-05 1967-05-02 Pillsbury Co Powdered nut product
US4000322A (en) * 1972-11-21 1976-12-28 Gerber Products Company Sweetened storage stable peanut butter spread and method of manufacture
US4004037A (en) * 1974-10-25 1977-01-18 Swift And Company Limited Peanut butter manufacture
US4273795A (en) * 1979-11-19 1981-06-16 Standard Brands Incorporated Low-fat spread and process
US4329375A (en) * 1980-10-21 1982-05-11 Nabisco Brands, Inc. Low-fat nuts with improved natural flavor
US4814195A (en) * 1987-03-20 1989-03-21 Winters Canning Co. Reduced calorie peanut butter product
US4828868A (en) * 1987-04-07 1989-05-09 Elescon, Inc. Low calorie peanut spread

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619207A (en) * 1969-08-14 1971-11-09 Procter & Gamble Peanut butter containing homogenized peanut paste
US4062986A (en) * 1973-12-06 1977-12-13 Gerber Products Company Method for preparing sweetened, storage stable, chunky peanut spread and product thereof
EP0381259A2 (en) * 1989-01-30 1990-08-08 The Procter & Gamble Company Improved nut butter and nut solid milling process
US5079027A (en) * 1989-01-30 1992-01-07 Procter & Gamble Company Nut butter and nut solid milling process
WO1992020243A1 (en) * 1991-05-10 1992-11-26 The Procter & Gamble Company Improved fluid, reduced fat peanut butters and improved whipped peanut butters
US5230919A (en) * 1991-05-10 1993-07-27 The Procter & Gamble Company Composition and process of making fluid, reduced fat peanut butters and improved whipped peanut butters
US5366754A (en) * 1993-06-22 1994-11-22 Kraft General Foods, Inc. Reduced fat peanut butter product and method of making

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996021364A1 (en) * 1995-01-12 1996-07-18 The Procter & Gamble Company Monomodal nut butters and spreads which have superior fluidity, texture and flavor
WO2014100017A1 (en) * 2012-12-17 2014-06-26 Living Healthy World LLC Methods for preparing and compositions comprising plant-based omega-3 fatty acids

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CN1068191C (en) 2001-07-11
JP3664257B2 (en) 2005-06-22
US5518755A (en) 1996-05-21
EP0804092A1 (en) 1997-11-05
JPH10500020A (en) 1998-01-06
CA2189746A1 (en) 1995-11-23
ATE188845T1 (en) 2000-02-15
EP0804092B1 (en) 2000-01-19
DE69514687D1 (en) 2000-02-24
DE69514687T2 (en) 2000-08-10
AU2235495A (en) 1995-12-05
CA2189746C (en) 2000-02-29
CN1151106A (en) 1997-06-04

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