Which grains are primarily used in bourbon production?

In bourbon production, the mash bill, which is the mixture of grains used to create the whiskey, must adhere to specific legal requirements defined by U.S. law. The primary grain must be corn, and the mash bill must consist of at least 51% corn to qualify as bourbon. In addition to corn, bourbons typically use a combination of rye, barley, and sometimes wheat.

The choice that indicates corn, rye, barley, and wheat accurately reflects the grains that are commonly used in bourbon production, encompassing the essential and alternative grains that distillers often include to influence the flavor profile and character of the spirit. Rye adds spiciness, barley contributes to smoothness and mouthfeel, and wheat can lend sweetness and softness. This combination allows for a range of bourbon styles and flavors, making the selected answer the most representative of typical bourbon grain composition.