What is the maximum proof at which bourbon whiskey can be distilled?

Bourbon whiskey must be distilled to a maximum of 160 proof, which is equivalent to 80% alcohol by volume (ABV). This is a requirement set by the regulations governing the production of bourbon, which emphasizes the need for the spirit to maintain certain characteristics associated with its flavor and quality. Distilling at a lower proof allows for the retention of more of the natural flavors from the grain used in whisky production, specifically corn, which is the primary grain for bourbon.

Higher proofs, beyond this limit, would extract more of the alcohol and less of the desirable flavors, affecting the unique profile that defines bourbon whiskey. Therefore, distilling it to no more than 160 proof is fundamental to ensuring that the spirit meets not only legal definitions but also the expectations of consumers for taste and quality.