Sour refers to:

Sour refers to:

• A. The sourness of bar mix used in cocktails
• B. A brand of bitters
• C. A garnish made from lemon zest
• D. A type of citrus soda

Answer: (A)

In bartending, sour points to the tart balancing element in cocktails—the sour mix that adds lemon or lime acidity to a drink. This mix provides the characteristic tang and, with sugar, helps balance sweetness from other ingredients. It’s a standard component across many cocktails and even names a family of drinks like whiskey sour or pisco sour, where that sour component is central. It isn’t referring to a brand of bitters, a garnish, or a citrus soda, which is why the sourness of the bar mix used in cocktails is the best fit.

In bartending, sour points to the tart balancing element in cocktails—the sour mix that adds lemon or lime acidity to a drink. This mix provides the characteristic tang and, with sugar, helps balance sweetness from other ingredients. It’s a standard component across many cocktails and even names a family of drinks like whiskey sour or pisco sour, where that sour component is central. It isn’t referring to a brand of bitters, a garnish, or a citrus soda, which is why the sourness of the bar mix used in cocktails is the best fit.