What is the primary flavoring grain used in bourbon production?

The primary flavoring grain used in bourbon production is corn. Bourbon must contain at least 51% corn in its grain mash bill, which is what significantly impacts its flavor profile. The high proportion of corn contributes to bourbon's characteristic sweetness and richness, distinguishing it from other types of whiskey. While other grains like barley, wheat, and rye can also be included in bourbon recipes, they are used in smaller amounts compared to corn. This is why understanding the role of corn is crucial in recognizing what defines bourbon and differentiates it from other whiskies, which may use different predominant grains.