1. Get a shiny metal mug (or any mug) and fill it with ice.
2. Mix the Kahlúa coffee liqueur and tequila together in a mixing jar.
3. Pour it into the mug over ice.
4. Top off with ginger beer and garnish with a lime wheel.
Fun fact
It’s probably their Mexican DNA, but Kahlúa coffee liqueur and tequila are the perfect partners. But don’t take our word for it—take the mule for a spin...