Which type of whiskey is typically used in a traditional Manhattan?

A traditional Manhattan is most commonly made with rye whiskey, which is known for its spicier and more robust flavor profile. Rye whiskey has a higher percentage of rye grain in its mash bill compared to other types of whiskey, giving it a distinct character that complements the sweetness of vermouth and the aromatic qualities of bitters in the cocktail. This combination creates a balanced drink that is both bold and nuanced.

While bourbon can also be used in a Manhattan for a sweeter variation, the classic recipe typically calls for rye whiskey. Scotch and Irish whiskey tend to have different flavor profiles and are not traditional choices for a Manhattan. Scotch is generally more peaty and smoky, while Irish whiskey is typically smoother and lighter, making them less suited for the rich and complex flavor sought in a Manhattan. Thus, rye whiskey is considered the foundation of this iconic cocktail.