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In brewing,adjuncts are unmalted grains (such asbarley,wheat,maize,rice,rye, andoats[1]) or grain products used in brewingbeer which supplement the mainmash ingredient (such asmalted barley). This is often done with the intention of cutting costs, but sometimes also to create an additional feature, such as better foam retention, flavours or nutritional value or additives. Both solid and liquid adjuncts are commonly used.
Ingredients which are standard for certain beers, such as wheat in awheat beer, may be termed adjuncts when used in beers which could be made without them — such as adding wheat to apale ale for the purpose of creating a lasting head. The sense here is that the ingredient is additional and strictly unnecessary, though it may be beneficial and attractive. Under theBavarianReinheitsgebot purity law it would be considered that an adjunct isany beer ingredient other than water,barley,hops, andyeast; this, however, is an antiquated view. This purity law originated in 16th-century Germany and did not initially include yeast due to the fact that it had not been discovered yet.[citation needed]
The term adjunct is often used to refer tocorn, rice, oats, unmalted barley and rye. The use of ingredients as substitutes for the main starch source is where the term adjunct is most often used.
Adjuncts can be broadly classified according to the physical form in which they are used into solids and liquid syrups.
Barley is used as an un-malted grain at up to 10% of the grist. Barley provides both carbohydrates and proteins to the wort; on the negative side, the cell walls of the un-malted barley contain high levels ofbeta-glucans that affect wort viscosity and create haze problems in the bright beer. Barley is also used in the mash as roasted barley to provide colour to the beer.
Cassava is a novel adjunct used in Africa either as a wet cake or as a purified starch.[citation needed]
Corn is commonly used in the production of American-style pale lagers, particularlymalt liquor. Corn is generally used in brewing ascorn syrup, and as such is highly fermentable. Corn is cheaper than barley, so it is used as a cost-saving measure.
Oats are used inoatmeal stouts. Oatmeal stouts usually do not specifically taste of oats. The smoothness of oatmeal stouts comes from the high content of proteins, lipids, andgums imparted by the use of oats. The gums increase the viscosity and body adding to the sense of smoothness.[2]
Rice is sometimes used in the production ofpale lagers, most notablyAnheuser-Busch'sBudweiser. Anheuser-Busch is the largest North American buyer of U.S. rice.[3] Rice may be used to lighten the body and the mouthfeel, or increase alcohol content, or add a little sweetness.
Rye is used inroggenbiers from Germany and in rye beers from America. Rye is notoriously difficult to brew with, so most rye beers only include a small amount of rye.[citation needed] Rye provides a spicy flavour to beer and dramatically increases head formation.
Sorghum is used inAfrica as a local ingredient saving on expensive imported malt and developing the local agricultural sector. Sorghum has a high gelatinisation temperature and is added to a mash cooker to gelatinise the starch before adding to the mash tun. Sorghum has been used for hundreds of years as the main ingredient in many of the indigenous traditionalAfrican beers. Sorghum can be used in the malted or the un-malted form.
Wheat is used inGerman and American wheat beers, inlambic and other Belgian ales, and in English ales. Wheat lightens the body, improves head retention, and provides a tart flavour. Wheat beers are often served with fruit syrups or slices of lemon in the US and Germany.
In England,beans were occasionally used as an ingredient in beer brewing.[4][5]
Sugar adjuncts provide only carbohydrates and if used at high levels will result in wort lacking in amino acids and this may lead to poor yeast growth causing tailing fermentations and poor yeast crops.
Primings sugars such asmaple syrup,honey, andmolasses are common in craft beers and homebrew.
Candi sugar is a common ingredient in strongBelgian ales, where it increases the beer's strength while keeping the body fairly light; dark varieties of candi sugar also affect the colour and flavour of the beer.
Caramel syrup is used to provide colour to brews and can either be added in the wort kettle or at filtration when needed to correct low beer colours. This caramel is not sweet and provides little or no fermentable extract.
Grain syrups (primarily corn syrup in North America) may be made from maize, wheat, rice or sorghum and are normally added in the wort kettle during the boil. The carbohydrate profile of these syrups may be tailored to suit the brewers' requirements and normally have a fermentability of between 70 and 100%. Typically these syrups are 74 to 80%w/w extract.
Honey is a primary fermentable inmead, and can be used for flavour (though also supplying some fermentable sugar) in beer.
Sucrose may come from sugar-cane or from sugar-beet.
A number of traditional beer styles are brewed withspices. For example, Belgianwitbier is brewed withcoriander,Finnishsahti is brewed withjuniper berries, and traditional beers in Britain are brewed with honey and spices. Also, some strong winter beers are flavoured withnutmeg orcinnamon, whileginger is a popular flavouring for a range of beers. Many commercially available pumpkin ales are made withpumpkin pie spices without any actual pumpkin.
Spices may be added to thewort during the boil or spices or spiceextract may be added at any time during fermentation depending on desired results.
Spices used in brewing include:
Other, less common flavourings include chocolate, coffee, milk,chili peppers and evenoysters.
Beer may be brewed with a fruit or vegetable adjunct or flavouring.
Fruits have been used as a beer adjunct or flavouring for centuries, especially with Belgianlambic styles.Cherry,raspberry, andpeach are a common addition to this style of beer. Modern breweries may add only flavoured extracts to the finished product, rather than actually fermenting the fruit.
Pumpkin-flavoured beers are brewed seasonally in the autumn in North America.
Chile pepper is used to flavourpale lagers.
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