How does the choice of grain affect the taste of bourbon?

The choice of grain significantly impacts the flavor profile of bourbon because each grain contributes its unique characteristics to the final product. Bourbon is primarily made from corn, which typically accounts for at least 51% of the mash bill, and this grain imparts a natural sweetness and a round, smooth mouthfeel. The use of other grains, such as rye, malted barley, and wheat, introduces varied flavor nuances; for instance, rye adds spiciness and boldness, while wheat can contribute a softer, more mellow sweetness.

Additionally, the interaction between different grains can create complex flavor layers, enhancing the overall tasting experience. Therefore, the careful selection and balance of grains by the distiller allows for a diverse range of bourbons, from those rich in sweetness to others with pronounced spiciness or earthiness. This complexity makes the choice of grain a crucial factor in defining the character and style of each bourbon, demonstrating why the correct answer emphasizes the distinct contributions of different grains.