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FEATURE B. H ANSEN AND B. W ASDOVITCH Briess Malt & Ingredients Company Chilton, WI T he demand for health-promoting, natural foods and foods made with whole-grain ingredients continues to grow. This, coupled with a renaissance in the art of creating artisan and specialty breads, is leading bakers to rediscover malt ingredients and the many ways these all-natural, wholesome, flavorful ingredients can be used to expand their R&D “toolbox.” Malt ingredients provide a number of benefits. They are all-natural and made only from grain and water. They are a good source of protein and B vitamins, including thiamin, riboflavin, and niacin. Malts are low in fat, and many are wholegrain ingredients. In addition, they are label friendly, and they can be produced as conventional or organic ingredients. The blanket term malt is often used to loosely describe one of several different classes of malt ingredients that deliver varying levels of flavor, color, texture and function to baked goods, including breads, bagels, pizza crusts, pretzels, crackers, etc. To help formulators select the appropriate malt ingredient for their baking application, the following classes are covered in this article: malt flours, malt extracts, and malted milk powder. Each class is characterized by the unique function it performs. To find the proper malt ingredient solution, the functions needed for a specific baking application must first be defined, and then, the appropriate class of malt ingredient can be determined: flour or extract, diastatic or nondiastatic, and traditional or specialty. What Is Malting and Malt? “Malting” is the process of sprouting and drying a grain seed. The product of this process is a malted seed. According to the CFR (21 CFR 184.1443a) (2), “Malt is an enzyme preparation obtained from barley which has been softened by a series of steeping operations and germinated under © 2005 American Association of Cereal Chemists, Inc. controlled conditions.” Thus, for descriptive and labeling purposes, the use of the term malt, unqualified, refers to malted barley. The term malt is synonymous with malted barley because the majority of the cereal grain malted in the world is barley, which is malted for use in beer. The malting process is a three-step process that requires only two ingredients: raw cereal grain (usually barley) and water. The first step is to steep or soak raw barley in large tanks of water for almost two days, until sufficient moisture is absorbed to activate enzymes and initiate sprouting and germination. The wet barley is then moved into large climate-controlled compartments, where the second step, germination, continues for four days. During this time, growth of the seed continues, and enzymes continue to be developed and produced. Germination is halted by the third step, drying in a kiln, which can last two days. Drying halts growth and stabilizes the sprouted seed, as well as developing pleasing flavors and removing “green” flavors. The finished product is a standard malt that contains high levels of alpha- and beta-amylase enzymes. These are the enzymes that convert starch into sugar for fermentation, which they do equally well in beer and bread. By adjusting the drying time, drying temperature, and order of the malting process, specialty malts can be produced. Specialty malts are characterized by distinctive flavors, rich colors, and either reduced levels or the absence of enzymes. Not all malting operations are equipped to produce specialty malts, which are made in small batches using unique drying and roasting equipment. Malt Flours Standard Diastatic Malt. A distinguishing characteristic of all malt ingredients is the presence or absence of enzymes. Malt ingredients that contain enzymes are classified as diastatic. Nondiastatic malt ingredients are processed at higher temperatures, which inactivates the enzymes. Malted barley flour is the functional malt ingredient milled from standard diastatic malt. In baking, high enzyme levels make diastatic malted barley flour an effective dough conditioner as a minor ingredient, often less than 1%, that adds no flavor or color to the crumb. 18 / JANUARY-FEBRUARY 2005, VOL. 50, NO. 1 The benefits of diastatic malted barley flour include • Increased fermentation • Decreased proofing time • Improved machinability and extensibility • Enhanced crumb and browning of crust • Little or no flavor contribution Other Malted Cereals. Cereal grains other than barley can be successfully malted. The most common include wheat and rye, both of which can be produced as diastatic or nondiastatic malts. When produced as diastatic malts, these cereal grains have enzymatic benefits similar to malted barley, but offer unique formulation, color, and flavor characteristics. For example, malted wheat flour is characterized by a “creamy” flavor, whereas malted rye has applications in rye-flavored breads and crackers. Benefits of diastatic malted wheat and rye flours include • Enhanced flavor • Enhanced color Specialty Malts—Diastatic. Specialty diastatic malts are dried further during kilning to develop intense bakery-type flavors, such as malty, biscuity, or nutty, while preserving some enzymatic activity (Table I). Because they have reduced enzyme levels, specialty diastatic malted barley flours are used at higher levels (up to 3%) to contribute more crumb flavor and color to breads, pizza crusts, and other yeast-fermented dough systems. Benefits of specialty diastatic malts include • Enhanced flavor • Enhanced color Specialty Malts—Nondiastatic. In addition to kilning at higher temperatures, an even wider variety of specialty malts are created through roasting. Roasted nondiastatic malts are characterized by pronounced flavors and colors. Light roasting creates reddish hues and caramel/toffee flavors. Caramel nondiastatic malted barley flours provide distinctive flavors and warm colors without the addition of enzymes, so there is no breakdown of the dough system. Benefits of caramel nondiastatic malted barley flours include • Sweet, caramel, toffee, and malty flavors, ranging from subtle to intense • Rich, warm colors • Enhanced texture and eye appeal • Nondiastatic (no enzymatic impact on dough systems) • Whole-grain ingredients • Rich in dietary fiber Dark roasting creates dark brown to black colors and flavors typical of other roasted foods, such as coffee and cocoa. Two distinctive styles of dark-roasted nondiastatic malted barley flours include “chocolate” and black malted barley flours. Chocolate malted barley flour has distinctive cocoa flavors and is dark brown. It can be used to provide cocoa flavor and color by substituting for up to 25% of the cocoa in a formulation, or it can be used in small amounts for color and eye appeal. Black malted barley flour has a neutral, dry, slightly acidic flavor and is often used in very small amounts (1–5%) to naturally color dark breads, crackers, and other dark colored baked goods while contributing little flavor. When compared with cocoa, the color of dark-roasted malts is more intense and much more soluble, with almost 70% of the flour solubilized. Dark-roasted malted barley flours provide a source of fine, dispersed dark flour containing large amounts of soluble color. They work well in dark bread, cookie, and cake mixes, as well as baked and extruded pet food applications. The benefits of dark-roasted nondiastatic malted barley flours include • Chocolate or intense roasted coffee flavors at higher levels • No flavor contribution when used in small amounts for color • Rich, dark colors • Enhanced texture and eye appeal • Nondiastatic (no enzymatic impact on dough systems) • Whole-grain ingredients • Rich in dietary fiber Malt Extracts Malted Barley Extracts. Malt can be further processed to produce liquid or dried sweeteners called malt extracts. Malt ex- tracts can be thought of as the original starchor grain-based sweetener. Long before the advent of acid conversion, genetically modified enzymes, and corn syrups, starch-based sweeteners were created for bakers and food processors using malted grains and water. Produced using a variant of the brewing process, malted grains are mixed with water, allowing the enzymes to break down the starch and proteinaceous material of the malted seed. Insoluble fiber is removed, and the resulting sugary liquid, instead of being fermented into beer, is concentrated to make a viscous, stable liquid sweetener or is dried to make a powder. Due to the type of enzymes naturally present in malt, malt extracts have carbohydrate profiles very similar to a high-maltose syrup. Because they are made from a whole grain, they also contain about 6% protein (8% db), as well as an abundance of free amino acids, vitamins, and minerals. These constituents, which are not present in starch-based syrups, increase the nutri- Table I. Diastatic power of malt ingredients Ingredient (Diastatic Power) Malt Class Flavor Contribution Malted barley flour (200 °Lintner) Vienna malted barley flour (130 ºLintner) Pale ale malted barley flour (85 ºLintner) Munich malted barley flour (50 ºLintner) Malted wheat flour (145 ºLintner) Malted rye flour (105 ºLintner) Biscuit malted barley flour (none) Caramel 40La malted barley flour (none) Caramel 120La malted barley flour (none) Chocolate malted barley flour (none) Black malted barley flour (none) Diastatic malt Specialty malt (diastatic) Malty, slightly biscuity Specialty malt (diastatic) Malty Specialty malt (diastatic) Robust malty Other malted cereals Other malted cereals Specialty malts (nondiastatic) Specialty malts (nondiastatic) Creamy Rye Biscuity, baking bread, nutty Sweet, caramel, toffee Specialty malts (nondiastatic) Specialty malts (nondiastatic) Specialty malts (nondiastatic) Light malt extract (none) Malted barley extracts Light diastatic malt extract (standardized to 20, 60, or 100 °Lintner) Caramel malt extract (none) Dark extract (none) Black malt extract (none) Diastatic malt extracts Pronounced caramel, burnt sugar, raisiny, prunes Cocoa, rich roasted coffee Dry, slightly acidic; none when used in small amounts Subtle malty; none when used in small amounts Subtle malty; none when used in small amounts Sweet, caramel Sweet, intense malty None when used in small amounts a Specialty malt extracts Specialty malt extracts Black malt extract Lovibond color scale. Table II. Typical composition of dry malt extractsa Property Analysis/100 g Calories Calories from fat Total fat (g) Saturated fat (G) Sodium (mg) Total carbohydrate (g) Dietary fiber (g) Protein (g) Calcium (mg) Iron (mg) Free amino nitrogen (ppm) Reducing sugars, as maltose (MEc) pH (10% solution) Color (Lovibond) Carbon (SIRAd) (δ13C %) Carbohydrate profile DP1, glucose (% as is) DP2, maltose (% as is) DP3, maltotriose (% as is) DP4+ (% as is) Light Standard Diastaticb 383 2 0.2 0.1 100 90 1 6 80 1.0 3,000 383 2 0.2 0.1 100 88 1 8 80 1.0 3,000 383 2 0.2 0.1 100 88 1 8 80 1.0 3,000 60–70 5.0–6.0 20–60 <–26 60–70 5.0–6.0 60–200 <–26 60–70 5.0–6.0 20–1,000 <–26 13 47 13 17 13 45 13 17 13 45 13 17 Specialty Malt Roasted Malt Extract Malted Milk Powder 383 2 0.2 0.1 100 88 1 8 80 1.0 3,000 367 2 0.2 0.1 100 88 13 7 80 1.0 2,000 400–420 36–72 4–8 2–4 100 72–78 1 14 100 1.0 2,000 60–70 20–30 5.0–6.0 4.5–6.0 100–800 4,000–6,000 <–26 <–26 13 45 13 17 5 16 8 58 45–60 5.5–6.5 N/A N/A 10 42e 10 15 a Solids: 0.97%. Diastatic power: 20–100 °Lintner. Maltose equivalent. d Purity tested by stable isotope ratio analysis. e Plus lactose. b c CEREAL FOODS WORLD / 19 similar to malted barley flours in that they ensure a supply of simple sugars, especially maltose, for fermentation. Supplying maltose is important to ensure gassing power during late pan proofing, when supplies of other naturally present or added sugars may have already been exhausted. Malt extract is approximately 50% maltose and 10% glucose. Roughly 80% of the solids are fermented by yeast (calculated on a dry basis). Using malt extract allows a baker to add these sugars without affecting the enzyme content of the overall dough. Typically, approximately 0.5–2% malt extract (flour weight basis) is used in fermented baked goods to supply sugars for adequate proofing (Table III). To supply sugars and generate them continuously (through enzyme action in the dough), bakers can use either standard malted barley flour plus malt extract or diastatic malt extract. Any type of malt extract can be used as a yeast food, although some of the highly colored extracts are much lower in fermentable substances. Browning Agents. The rich characteristic flavors of many baked goods (e.g., pretzels, bagels, hearth breads, hard rolls, breakfast cereals, and crackers) are due to the browning and flavor enhancement of malt extracts. Reducing sugars and free amino acids enhance surface browning, leading to improved baked flavors and richer crusts and surfaces. This benefits both chemically and yeast-leavened fresh baked goods, as well as frozen doughs, such as pizza crusts, by contributing rich flavors, improved crust color and texture, and richer baked aromas. Crust browning is enhanced by usage rates as low as 0.5%, although levels for malt extracts used as crust enhancers can be as high at 3% (Table III). This strong browning ability is also used to improve processing of traditional bagels, which can be boiled in a natural alpha-amylase present in the malt survives the extraction process. Thus, it is possible to make a diastatic malt extract. Like malted barley blends, it is standardized to a certain enzyme activity, typically 20 or 60 °Lintner. Unlike malted barley flour, which contains a wide range of enzymes, only the more thermostable enzymes survive this extraction process. Fortunately for bakers, it is the more stable enzymes, especially alpha-amylase, they normally require for functionality in baking systems. Diastatic malt extracts act both as a sweetener and enzyme source for baking. Because they are enzyme active, their usage rate is usually less than 5% (Table III). Specialty and Black Malt Extracts. Beer comes in a variety of flavors and colors, from dark stouts and porters to rich copper Oktoberfests. Malt extracts (the “unfermented sugars of beer”) produced using specialty malts have a correspondingly wide variety of flavors, flavor intensities, and colors. Because of the many types that can be made, malt extracts can have many different functions in bakery products, but they generally serve one or more of the following purposes: fermentable material or yeast food, browning and flavoring agents, colorant, sweetener, and enzyme source. Selecting the right malt extract requires an understanding of the desired functionality and choosing the most appropriate product. tional value of malt extract as a nutritive sweetener and account for its use as a yeast food and browning agent. The typical composition of malt extracts is listed in Table II. Malt extract can be made from any type of malted grain. However, similar to the term “malt,” the term “malt extract” unqualified refers to an extract of malted barley. According to the CFR, an extract of 100% malted barley can also be referred to as malt syrup. Extracts of other malted grains would be properly labeled as “extract of malted wheat” or “malted wheat extract.” Coextracts of Malt and Other Cereal Grains. Other unmalted grains or starch sources can be converted into extracts, using malted barley as a natural enzyme source. This is done most often for economy and, in some cases, to make a lighter flavored syrup. Most commonly, corn or raw (unmalted) barley is used as an adjunct (cheaper source of starch) to make these extracts, which are properly labeled as “extract of malted barley and corn” or “extract of malted barley and barley.” The latter is sometimes correctly, but confusingly, referred to as “barley and malt extract.” For many years, coextracts of malt and corn and blends of malt extract and corn syrup were mistakenly labeled as “malt syrup” or “liquid malt.” This mislabeling and adulteration led to the establishment of methods (such as stable carbon isotope ratio analysis) to detect corn products mixed with malt (1) and to the issuance of a FDA policy statement on malt extract labeling. Since then, these coextracted sweeteners have generally fallen out of use, because much greater savings can be realized by simply blending malt extract with corn syrup in applications where economy or a less intense malt flavor is desired. Diastatic Malt Extracts. If the extraction conditions are adjusted, some of the Malt Extract Functions Fermentable Material or Yeast Food. Rich in maltose, glucose, free amino acids and minerals, malt extract supplies all the components that a healthy yeast needs to work properly. Because of this, malt extract is often used in growth media for yeast and bacteria cultures or starters. In fermented baked goods, malt extracts have benefits Table III. Usage rate recommendations for malt flours and sweetenersa Product White breads Hearth breads Dark breads Sweet breads Rolls Crackers Bagels Biscuits Pizza crust Cookies Chocolate baked goods Brownies Icings Pretzels RTE breakfast cereals Standard Flours (%) Other Malted Malted Barley Grains Specialty Flours (%) Malt Extract Sweeteners (%) Malt– Diastatic Malt– Nondiastatic Malt– Dark Roasted Malted Barley x x x 1–5 x x x x x 5 Specialty 0.5–1 0.5–1 0.5–1 0.5–1 0.5–1 0.5–1 0.5–1 x 0.5–1 x 0.5–1 0.5–1 0.5–1 0.5–1 0.5–1 0.5–1 0.5–1 x 0.5–1 x 1–3 1–3 1–3 1–3 1–3 1–3 1–3 x 0.5–3 x 1–2 1–2 1–5 1–5 1–2 1–2 1–5 1–2 1–3 1–5 xc x 2–5 x x x x x x x 1–2 1–3 1–3 1–5 1–2 0.5–2 1.5–4 1–2 1–3 2–8 1–2 1–3 1–3 1–3 1–2 0.5–2 1–2 1–2 1–2 x 1–2 1–3 1–3 1–5 1–2 0.5–2 1.5–4 1–2 1–3 2–8 1–3 1–3 1–3 1–5 1–2 0.5–2 1.5–4 1–2 1–3 2–8 0.25 0.25 2–5 0.3–2 0.25 x 0.25 0.25 x x x x x 0.5–2 x x x 0.5–2 x x x 1–3 2–5 2–5 x 1–3 5–25 5–25 x x 2–10 2–10 5–25 1–4 x x x 1–4 2–10 2–10 x 1–4 2–10 2–10 5–25 1–4 1–5 1–5 2–5 x 10 10 20 x x x x x 1–3 1–3 1–3 1–3 1–3 x x Diastatic (20 °L)b Malted Milk Powder Dark Roasted a Extra Light Malt extract usage based on dry malt extract. All percentages are based on flour weight, except for icings, chocolate baked goods, cookies, brownies, and RTE breakfast cereals, which are based on a dry formula weight. b Diastatic power in °Lintner. c Not normally recommended. 20 / JANUARY-FEBRUARY 2005, VOL. 50, NO. 1 solution of 3% malt extract to enhance surface browning and shine. Colorants. Malt extracts are well known for increasing crumb color in baked goods when used alone. Specialty and black malt extracts are manufactured specifically to be used as natural, intense sources of colors, from gold to amber to reddish brown to black. Specialty malt extracts made with caramel nondiastatic specialty malts provide red-yellow hues in crumb at low usage levels of 0.5–1% (Table III). As mentioned previously, the color of dark-roasted specialty nondiastatic malts is mostly soluble. Use of these malts to make extracts results in a product that is 2–3 orders of magnitude (100–1,000 times) darker than conventional malt extract. These extracts provide color that is on a par with Class I caramel colors, or approximately one-quarter as intense as Class III caramel colors. They contain no sulfites and serve as clean-label alternatives to synthetic and caramel colorants and, thus, can be used in bakery applications that require non-GMO ingredients or for which “all-natural” claims are needed. Because their color is soluble, dark-roasted specialty nondiastatic malts can be used to evenly darken the crumb with a variety of shades from tan to brown to black. Because of the malts used to manufacture them, black malt extracts have vastly different nutritional and functional characteristics than normal malt extracts (Table II). Sweetener. Malt extract is a nutritive sweetener that has approximately 60% of the sweetness of sucrose. Malt extract has a long-lasting sweetness, which, along with its characteristic flavor, can function as a masking agent for bitter notes. This is particularly useful in low-carb, high-protein baked good formulations. Malt extract is used in baked goods, granolas, and bars for sweetening, as well as for binding and humectancy. It is also one of the few available types of starch-based sweeteners (along with rice syrup) that can be used as an alternative to corn syrup in non-GMO, organic, and all-natural foods. Where these benefits are desired without malt’s characteristic flavor, extra light malt extracts or malt and grain coextracts can be used. These extracts have approximately one-quarter the color of traditional malt extracts and have a very light malt, almost honey-like flavor. Flavoring Agent. Malt is a popular flavor and flavor note that is well known in and of itself and as a background note to enhance flavors such as cocoa, mocha, and toffee. The flavor of a malt extract depends on the processing and types of malt used to make it. Specialty malt extracts offer more intense flavors and colors and typically have cleaner, more pure flavor notes than standard malt extracts manufactured for other purposes, such as yeast foods. Malt extracts manufactured from caramel nondiastatic specialty malts have rich, intense malt and caramel flavors and can be used in bakery applications in which malt notes are desired but at lower usage levels than required for standard malt extracts (Table III). These specialty malt extracts perform especially well in applications where the malt will be one of the main flavor components, such as sweet baked goods, icings, and fillings. Enzyme Source. Diastatic malt extracts function in much the same way that malted barley flour does in baked goods, acting as a dough conditioner and source of enzymes to generate free sugars during proofing and fermentation. Some modern diastatic malt extracts are simply a blend of nondiastatic malt extracts with fungal or bacterial alphaamylase. Malt alpha-amylase is more thermostable than fungal alpha-amylase and less thermostable than bacterial alpha-amylase. If the source of the enzymes is important to formulators, it is important to ask whether the diastatic malt extract is naturally extracted or blended. Dry Versus Liquid. Malt extracts come in two forms—liquid and dry. Their composition (dry basis) is the same, and the choice of liquid or dry is most often based on convenience in processing. Liquid malt extracts are 80% solids and cost less on an as is and dry basis than dry extracts due to the high cost of drying. Like other liquid sweeteners, liquid malt extract has a high viscosity (4,000 cps at 80°F) and may re- quire heating or special pumping equipment if it is to be batch added from bulk. Liquid malt extracts can darken with time and become more acidic due to Maillardtype reactions, especially when stored at temperatures higher than 80°F. The flavor may also change, becoming more molasses-like and losing some of its malt character. If light color or consistent flavor is needed, dry malt extract or liquid malt extract that has been stored at temperatures lower than 65°F should be used. Dried malt extracts are also called malt powders. They can be substituted for liquids, using 0.8 lb of dry powder and 0.2 lb of water for every pound of liquid extract. They are strongly hygroscopic, and opened packages must be stored in sealed containers or dry areas to prevent moisture absorption and clumping. Dry malt extracts are produced in various particle sizes and resultant dispersabilities. In dry baking mixes, fine powders are often used. In applications requiring better dispersability, larger particle size or agglomerated malt extracts are used. Malted Milk Powder Another well-known malt ingredient is malted milk powder—a complex blend of malted barley and wheat extract, milk, salt, and baking soda. Dried to a powder, this sweetener is most commonly used in con- An advertisement appeared here in the printed version of the journal CEREAL FOODS WORLD / 21 fectionery to make candy centers, in dairy desserts to flavor ice cream, and in milk shakes. This ingredient contains approximately 10–25% milk solids and can be used in baked goods to provide sweetness, flavor, and milk solids. Malted milk powder provides a sweet, pleasing flavor to sweet goods and works well in icings and fillings. Malt Ingredient Solutions Malt-based ingredients play diverse, multifunctional roles in baked good formulations, acting as enzyme-active dough conditioners, nutritive sweeteners, colorants, flavoring agents, and confectionery ingredients. Finding the proper malt-based solution requires definition of the needed functions and determination of the ingredient desired: flour or extract, diastatic or nondiastatic, and standard or specialty. References 1. Budde, A. D., Henson, C. A., Jones, B. L., and Peterson, D. M. Detecting corn syrup in barley malt extracts. Cereal Chem. 78:349, 2001. 2. FDA. Direct food substances affirmed as generally recognized as safe. Malt. 21 CFR 184.1443a. Code of Federal Regulations. U.S. Government Printing Office, Washington, DC, 2004. The Authors Bob Hansen is the manager of technical services for Briess Malt & Ingredients Company (Chilton, WI). Hansen joined Briess in 2001 as a staff brewer. He commissioned the company’s state-of-the-art extract plant in 2002 and was named manager of technical services in 2003. His responsibilities include research and development of all new products and assisting customers with ingredient applications. Hansen holds a B.S. degree in biochemistry and applied math and physics from the University of Wisconsin-Milwaukee. He has 14 years of professional experience working with malt ingredients as a brewer, consultant, and lecturer and in research and development and is an award-winning brewmaster. Hansen is a member of the American Association of Cereal Chemists and Master Brewers Association of the Americas. Bernadette Wasdovitch is the marketing manager for Briess Malt & Ingredients Company (Chilton, WI). Wasdovitch joined Briess in 1997 as the communications coordinator. She was named communications manager in 2001 and marketing manager in 2003. Wasdovitch holds a B.S. degree in mass communications from the University of Wisconsin-La Crosse. She completed an American Institute of Baking course “Baking 101” in 2004. Wasdovitch is a member of the Bread Bakers Guild of America. An advertisement appeared here in the printed version of the journal 22 / JANUARY-FEBRUARY 2005, VOL. 50, NO. 1