What size shot is typically used for the base spirits in a Rob Roy?

The typical size of a shot used for the base spirits in a Rob Roy is 1.5 ounces. This measurement aligns with standard bartending practices for cocktails, where a shot is commonly defined as 1.5 ounces. The Rob Roy is a whiskey-based cocktail, similar to a Manhattan but made with Scotch whisky. Using 1.5 ounces allows for a balanced flavor profile in the cocktail, maintaining the right ratio of spirit to vermouth, which is essential for achieving the desired taste.

The choice of 1.5 ounces ensures that the drink is not overly strong or weak, providing a solid base for the other ingredients, like sweet or dry vermouth, depending on the variation being made. Understanding standard shot sizes is important for bartenders in crafting cocktails that are consistent in flavor and strength, which is crucial for maintaining quality service.