What is the main whiskey used in a Rusty Nail cocktail?

The main whiskey used in a Rusty Nail cocktail is Scotch Whiskey. This cocktail is traditionally made with a blend of Scotch whiskey and Drambuie, which is a sweet, herbal liqueur. Scotch whiskey contributes to the drink's distinctive flavor profile, as it offers smokiness and complexity that complement the sweetness of Drambuie. The combination creates a rich and smooth drink that highlights the characteristics of the Scotch.

While other types of whiskey such as bourbon, Irish whiskey, and rye whiskey have their unique flavors and uses in different cocktails, they do not align with the classic recipe for a Rusty Nail, which specifically calls for Scotch. This alignment with Scotch is essential to achieving the intended taste of the cocktail.