Which cocktail is made with whiskey, sweet vermouth, and bitters?

The cocktail that is made with whiskey, sweet vermouth, and bitters is the Manhattan. This classic cocktail is known for its smooth, rich flavors that come from the combination of the whiskey and the sweet vermouth, while the bitters add complexity and depth.

The Manhattan typically uses rye whiskey or bourbon as its base spirit, and it is stirred with ice to chill and dilute it before being strained into a cocktail glass. It is often garnished with a maraschino cherry or a twist of lemon peel, which enhances its aromatic profile.

This drink has historical significance and is a staple in cocktail culture, making it a vital cocktail to know for anyone studying bartending. The balance of ingredients in a Manhattan exemplifies the concept of cocktail composition, where the choice of whiskey and the type of vermouth can significantly affect the drink's flavor.