Definition | What Whiskey Is and Why the Grains Matter

To know what’s possible within whiskey’s flavors, we first need to understand exactly what it is—there are legal definitions and limitations on ingredients, proof, and process. From there, we can better explore what’s possible within those clear boundaries—for example, different varieties of corn, rye, wheat, barley, or oak. There are also flavorful alternative grains to consider, such as triticale or rice. Grains are what define whiskey.