A mash bill is a combination of grains used to produce whiskey. It is typically composed of corn, rye, wheat, and malted barley, although other grains can be used. The proportions of each grain in the mash bill will affect the flavor and character of the whiskey.
The mash bill is an important factor in determining the taste, aroma, and texture of a whiskey. Different grains impart different flavors and characteristics to the whiskey. For example, corn gives whiskey a sweet flavor, rye gives it a spicy flavor, wheat gives it a smooth flavor, and malted barley gives it a malty flavor. The proportions of each grain in the mash bill can be adjusted to create a whiskey with a unique flavor profile.