Bourbon is a type of American whiskey that is primarily made from corn, along with other grains such as rye, wheat, and barley. To be considered bourbon, the whiskey must meet certain legal requirements. It must be made in the United States, must be made from a grain mixture that is at least 51% corn, It must be aged in new, charred oak barrels, it must be distilled to no more than 80% alcohol and bottled at a minimum of 40% ABV, and cannot contain any additives, except for water to adjust the proof.

Bourbon is usually aged for at least two years, but many bourbons are aged for much longer periods of time. The longer a bourbon is aged, the more complex its flavor profile becomes, with notes of vanilla, caramel, and oak becoming more pronounced. Bourbon is a popular spirit both in the United States and around the world, and is enjoyed on its own or in cocktails such as the classic Old Fashioned and the Manhattan.