The Kentucky Mule substitutes bourbon for vodka, hence the “Kentucky” moniker. The weightier profile of bourbon cuts through the ginger more noticably than vodka, resulting in a more flavorful drink than the original. For the best results, use a high-quality ginger beer with a spicier flavor profile that can better stand up to the whiskey. Or, if you’d like to experiment, you can try your hand at making your own ginger syrup. In that case, use club soda as your bubbly topper.

The Kentucky Mule is exceedingly easy to make. Simply combine your ingredients with plenty of ice in a copper mug, if you have one. Otherwise, a highball glass will do. Garnish with mint, and you have an whiskey-based twist on the classic that you’ll want to drink all year long.

Référence : https://www.liquor.com/recipes/kentucky-mule/