What is the main grain used in the production of Bourbon?

The main grain used in the production of Bourbon is corn. According to U.S. regulations, for a spirit to be classified as Bourbon, it must contain at least 51% corn in its mash bill. Corn contributes a natural sweetness to the whiskey, which is an essential characteristic of Bourbon's flavor profile. In addition to corn, other grains like rye, barley, and wheat may also be included in smaller proportions, but it is the predominance of corn that defines the spirit as Bourbon, making it distinct from other types of whiskey. This high corn content is key to its unique taste and aroma.