Tasting rice and maize in lager and what adjuncts do to flavour
Rice and maize are the quiet ingredients in a great deal of the world's lager. They are not shortcuts or fillers in the way people often assume. They change flavour, body and colour in ways you can learn to taste.
What an adjunct is
In brewing, an adjunct is any source of sugar other than malted barley. Rice and maize are the most common in lager. Neither is malted, so neither brings enzymes of its own. The barley malt in the mash supplies the enzymes that turn the starch from all the grains into fermentable sugar.
In many mainstream lagers around the world, adjuncts make up somewhere around 20 to 40% of the grist. Some craft brewers use smaller amounts. Others, especially in all-malt traditions such as German pilsner, use none.
Why brewers use them
Cost and supply play a part. In India, rice and maize are grown widely and are often cheaper and easier to source than imported malting barley. But flavour is just as important. Adjuncts make a lighter, crisper, paler beer with less malt flavour. In hot weather that is exactly what many drinkers want. Our guide to rice and maize adjuncts in India covers the brewing side in more depth.
Before the starch in rice or maize can be used, it has to be gelatinised. Many breweries cook it in a separate vessel called a cereal cooker, bringing it to the boil before adding it to the main mash. Without that step the starch stays locked up and the brewer loses extract.
What rice tastes like in beer
Rice is the most neutral grain a brewer can use. It adds fermentable sugar and very little else. A rice lager tends to be pale, dry and clean, with a short, crisp finish. The malt flavour is there but quieter. The body feels lighter. Some people describe a faint, delicate sweetness or a very light floral note, but the main effect is subtraction: less bread, less grain, less weight.
What maize tastes like in beer
Maize brings a little more than rice. It can add a soft, rounded sweetness and a slightly fuller feel in the middle of the palate, sometimes with a faint corn note. That is different from the cooked sweetcorn aroma of DMS, which is a fault from the boil and cooling, not from the maize itself.
American light lager is the best-known example of an adjunct lager. Our American light lager guide explains how far the style pushes lightness.
How to taste the difference
Set up a small side by side with two pale lagers of similar strength:
- An all-malt lager, such as a German helles or pilsner.
- An adjunct lager, ideally one that lists rice or maize on the label.
Pour about 100 ml of each into identical glasses, chilled to around 5 °C. Look first: the adjunct lager is usually paler. Watch the foam, which is often lighter and fades sooner because there is less malt protein. Smell both. The all-malt beer smells of bread and cracker. The adjunct beer smells cleaner and lighter. Then taste and pay attention to body. The all-malt lager feels fuller. The adjunct lager finishes faster and drier.
Our guide to mouthfeel and body explains what you are feeling.
Lighter does not mean worse
Adjunct lagers get a hard time from some beer fans. That is unfair. Brewing a clean, pale, light lager is technically demanding, because there is nothing to hide behind. Any fault shows. Rice lagers have long been popular in Japan and many traditional Indian lagers depend on adjuncts. The question is never whether adjuncts are good or bad. It is whether the beer does what the brewer intended.
Other adjuncts you will meet
Rice and maize are not the only adjuncts. Sugar, often cane sugar or glucose syrup, is added straight to the kettle in many strong lagers. It ferments almost completely and leaves little behind except alcohol, so it raises strength without adding body. That is one reason some strong lagers feel thinner than their ABV suggests. Unmalted barley and wheat appear in some recipes too. Oats and wheat add the opposite effect to rice: more body, more haze and a softer, silkier feel. Our guide to oats in beer covers that side.
Each adjunct leaves a fingerprint. Once you know what rice tastes like, sugar and oats become easier to spot by contrast.
A palate that can tell
Once you have tasted the two styles side by side, try it blind with a friend pouring. Most people find they can pick the adjunct beer by body and finish within a few sips. That small skill opens up a lot: you start to notice how every ingredient in a recipe leaves a trace in the glass.
Common questions
Do rice and maize make beer taste cheap?
No. They make beer lighter, paler and crisper. Whether that suits you is a matter of taste. Clean adjunct lagers are hard to brew well.
Why is rice used in Indian lager?
Rice is widely grown in India, adds fermentable sugar without heavy flavour and produces a light, crisp beer that suits hot weather.
Does maize make beer taste of sweetcorn?
Not usually. Maize can add soft sweetness. A strong cooked sweetcorn aroma is normally DMS, a fault from the boil and cooling.
Can I taste whether a lager contains adjuncts?
Often, yes. Adjunct lagers tend to be paler with lighter foam, less bready aroma and a thinner, drier finish than all-malt lagers.
