Add vodka (1 1/2 Ounces), lime juice (1/2 Ounce ) and diet ginger beer (1/2 cup) to a moscow mule mug, or glass and gently stir.
Add ice to cup, garnish with lime wedges, and enjoy!
Notes
Traditionally this cocktail is made with ginger beer, but the diet version of this can be hard to find. Substitute for ginger ale for a little less spicy flavor.