Bourbon whiskey is a type of American whiskey that is primarily made from a mash of at least 51% corn and aged in new charred oak barrels. The name "bourbon" comes from the fact that the whiskey was originally produced in Bourbon County, Kentucky, although it can now be made anywhere in the United States.

In addition to the corn, bourbon whiskey can also be made with other grains such as rye, barley, or wheat, which give it unique flavor characteristics. Bourbon is also required to be distilled to no more than 80% alcohol by volume (160 proof) and bottled at a minimum of 40% alcohol by volume (80 proof).

To be considered "straight bourbon," the whiskey must be aged for at least two years, although many bourbons are aged for much longer than that. The aging process gives bourbon its distinctive caramel color and flavors of vanilla, oak, and char.

Bourbon is a popular type of whiskey that is often enjoyed neat, on the rocks, or in classic cocktails like the Old Fashioned or the Manhattan.