What is the primary grain used in the production of bourbon?

The primary grain used in the production of bourbon is corn. By law, bourbon must contain at least 51% corn in its grain mash bill, which is the mixture of grains used in the distillation process. This high corn content contributes to bourbon's characteristic sweetness and rich flavor profile, distinguishing it from other types of whiskey. The majority of bourbons are produced in the United States, often in Kentucky, where the availability of corn has historically influenced the development of this iconic spirit.

The other grains listed, such as rye, barley, and wheat, can provide additional flavors and are sometimes included in the mash bill, but they do not serve as the primary grain necessary for a spirit to be classified as bourbon. Rye typically adds spiciness, barley can enhance maltiness, and wheat tends to contribute a softer, smoother mouthfeel, but these grains cannot replace corn as the dominant grain in bourbon production.