What is the percentage of maize typically used in the classic American lager?

The classic American lager typically uses around 30% maize in its grain bill. This adjunct grain is added to create a light body, crisp flavor, and to enhance fermentation efficiency. The use of maize helps in producing a clean, refreshing beer that is characteristic of lagers in this style. By incorporating maize, brewers can also achieve a lighter color and maintain a lower cost compared to using 100% malted barley.

In contrast, using higher percentages, such as 40% or 50%, could lead to alterations in the flavor profile and mouthfeel, making the beer less characteristic of the classic American lager style. Lower percentages like 20% might not provide the desired crispness and lightness associated with this beer type. Therefore, the 30% level strikes a balance, allowing for the clean profile that defines American lagers while optimizing production efficiency.