What is the primary liquor used in an Iron Butterfly cocktail?

In an Iron Butterfly cocktail, the primary liquor is vodka. This choice is rooted in the tradition of many modern cocktails that focus on vodka as the base spirit due to its versatility and neutral flavor profile, which allows other ingredients to shine. The Iron Butterfly typically combines vodka with coffee liqueur and sometimes cream, creating a rich and creamy drink.

Each of the other liquors listed, such as gin, rum, and tequila, offer distinct flavor profiles that do not align with the typical recipe for an Iron Butterfly. Gin, for instance, has herbal and floral notes, rum brings sweetness and tropical hints, and tequila introduces earthy agave flavors. However, none of these capture the essence of the Iron Butterfly, which is meant to highlight the smoothness and adaptability of vodka in cocktail mixes.