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Writer's pictureFood & Drinks Tips Team

Exploring the Malting Process


malted grain

Malting is the controlled process of germination of cereals (wheat, rye, oats, corn and barley), followed by the heat to dry those grains in the kiln. A kiln is a type of oven or furnace used for various purposes, including drying, baking, firing, or curing materials at high temperatures. It looks like a pizza oven. In the context of malting, a kiln is a specialized chamber used to dry and cure germinated barley (green malt) to produce finished malt suitable for brewing beer or other applications.


Each grain offers unique flavor profiles and characteristics that can influence the final product. Wheat malt, for example, tends to impart a softer, sweeter flavor compared to barley malt, while rye malt adds a distinct spicy or earthy note. Oat malt contributes to a smooth and creamy mouthfeel, often used in stouts and oatmeal beers, while corn malt can provide a subtle sweetness. Regardless of the grain used, the malting process follows a similar pattern of steeping (two or three immersions under water), germination, and drying to unlock the grains' enzymatic potential and convert starches into fermentable sugars.


Furthermore, malt's nutritional profile extends beyond its role in brewing, offering various health benefits. In addition to its rich content of B vitamins and essential minerals like magnesium and phosphorus, malt also provides dietary fiber, which supports digestive health and helps regulate blood sugar levels. Moreover, the antioxidants present in malt can help reduce inflammation and protect against oxidative stress, contributing to overall well-being when incorporated into a balanced diet. Thus, while malt remains a cornerstone in the brewing industry, its nutritional value underscores its versatility and potential for enhancing various culinary creations and promoting health and wellness.


Malt is a versatile ingredient with a wide range of uses across various industries. Some of the main uses of malt include:


  • Beer Production: The most well-known and traditional use of malt is in beer production. Malt provides the fermentable sugars needed for fermentation, as well as flavor, color, and body to beer.


  • Baking: Malt is often used in the baking industry to add flavor, color, and nutrition to baked goods. It can be used as a primary ingredient or as an additive to improve the quality of bread, cakes, cookies, and other baked products.


  • Distilling: In some distilleries, malt is used in the production of spirits such as whiskey, bourbon, and other distilled alcoholic beverages. Malt contributes flavor and complexity to spirits.


  • Food Manufacturing: Malt is also used in the manufacturing of a variety of processed foods, such as breakfast cereals, cereal bars, syrups, sauces, and condiments, where it can serve as a natural sweetener or provide flavor and color.


  • Dairy Industry: Malt can be added to dairy products such as malted milk, ice cream, and shakes to add flavor and nutritional value.


  • Animal Feed: In some situations, malt may be included in animal feed, especially for livestock such as cattle and poultry, to provide additional nutrients and improve digestive health.


Barley is often considered the best option for the malting process due to its specific characteristics that make it ideal for malt production. According to the UK malting industry, here are some reasons why barley is widely used in the malting industry:


  • Starch Content: Barley contains an adequate amount of starch, making it an efficient source of fermentable sugars during the malting process. This means that barley can be easily converted into malt with a high sugar content, essential for fermentation in beer and other alcoholic beverages.


  • Protein Content: Barley has a suitable protein content for the malting process. The proteins present in barley help provide enzymes necessary for the conversion of starch into sugars during germination and contribute to the formation of stable foam during beer mashing.


  • Husks: Barley has natural husks that are important during the beer mashing process. The husks aid in wort filtration during mashing, assisting in the removal of undesirable solids and obtaining a clear liquid for fermentation.


  • Flavor and Aroma: Barley contributes characteristic flavors and aromas to the malt, which are transferred to the final beer. These flavors and aromas vary depending on the type of barley, the malting process, and the roasting used, allowing for a wide range of flavor profiles in beer.


Maltin​g grains at home offers several advantages and opportunities for culinary enthusiasts, homebrewers, and artisanal producers. It gives you full control over the entire process, from selecting the grains to the drying and roasting method. This allows you to adjust parameters according to your preferences and create customized malt for different recipes. Maltin​g grains at home ensures fresh, high-quality malt without additives or preservatives. This can result in final products with richer and more complex flavors, providing a unique sensory experience.


The homemade process can be more economical in the long run, especially if you produce large quantities of malt regularly. While an initial investment in equipment may be required, the cost of raw ingredients is generally lower than commercially available malt. This process offers the opportunity to explore different types of grains, malting techniques, and flavor profiles. This allows for experimentation and the creation of unique malts for a wide variety of beer recipes, breads, cakes, and other culinary products.


For many people, maltin​g grains at home is a rewarding and educational hobby. The malting process can be challenging and engaging, providing a sense of accomplishment when producing high-quality malt from scratch.


While different grains can also be successfully malted, barley remains the preferred choice to start, due to its chemical composition and characteristics that make it ideal for producing high-quality malt.


To malt barley at home, you'll need a few basic utensils and specific equipment. Here's a list of the necessary items:


  • Barley: Start with high-quality barley, preferably two-row, which is most commonly used in malt production.

  • Germination container: You'll need a container with drainage holes for sprouting the grains. A PET container can be used as a germination container for malted barley and you can learn how to do it yourself down here.



  • Thermometer: A thermometer is useful for monitoring temperature during the germination and drying process.


  • Oven or food dehydrator: To halt germination and dry the grains, you'll need an oven with controlled temperature or a food dehydrator.


  • Roller mill (optional): If you choose to husk the grains after germination, a roller mill may be helpful for this process.

  • Sieve or filter: To remove any impurities from the grains during the cleaning and rinsing process.

  • Airtight containers: After malting the grains, you'll need airtight containers to properly store them.


The process:


  • Choosing and Preparation of Barley:

Start selecting high-quality two-row barley for malting. Ensure that the grains are clean and free from impurities. Then, wash the barley grains in clean water to remove any dirt or dust. Next, soak them in clean water, two or three immersions, for about 8 to 12 hours each to hydrate them before germination. This process is also called steeping.


  • Germination of Barley:

After the soaking period, drain the water from the grains and spread them in a uniform layer on a tray or container with drainage holes to allow for ventilation. Keep the grains moist but not waterlogged and maintain them in a location with temperatures between 15°C and 20°C. During the initial days, mist the grains every 8 to 12 hours to keep them moist and promote germination. The grains will begin to sprout after approximately 2 to 4 days, during which time small, visible sprouts will develop.


steps of malting

  • Halting Germination:

When the sprouts reach approximately the length of the grain, it is time to halt the germination process to prevent overgrowth. This is achieved by drying the grains at a controlled temperature between 40°C and 50°C in the kiln oven. But this process can be done in an oven or a food dehydrator. The drying time may change depending on humidity and grain type but generally takes 24 to 48 hours. The objective is to dry the grains until the sprouts cease growing and are firm to the touch while still maintaining adequate internal moisture.


  • Barley Husking (Optional):

After drying, some homebrewers opt to remove the outer husk of the barley grains to produce huskless malt, which imparts a slightly different flavor profile. To husk the grains, you can use a roller mill or a husking machine. This will remove the outer husk, exposing the inner endosperm. However, many homebrewers choose to retain the husk on the grains as it can aid in filtration during the beer mashing process.


  • Cleaning and Storage:

Following the drying and, if applicable, husking process, the malted grains should be cleaned to remove any unwanted materials such as roots or husk fragments. Store the malted grains in an airtight container in a cool, dry place until they are ready to be used in brewing beer, making bread, or other recipes. By following these steps, you can malt your own barley at home to create fresh, high-quality malt for your beer recipes or other culinary applications.


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