What is the base liquor in an Old Fashioned cocktail?

The Old Fashioned cocktail traditionally uses whiskey as its base liquor. This classic drink is characterized by its simple yet rich flavor profile, which is built around the whiskey. The whiskey provides a robust foundation, and it is typically complemented by the addition of sugar, bitters, and garnished with a twist of citrus peel or a cherry.

While variations of the Old Fashioned do exist that may incorporate other spirits such as rum, brandy, or vodka, the authentic version is fundamentally linked to whiskey, particularly bourbon or rye. This connection to whiskey not only defines the drink but also impacts its overall taste and character, making it a timeless favorite among cocktail enthusiasts.