Final answer:
The traditional garnish for a Moscow Mule is a lime wedge, which complements the drink's flavors and is used for both aesthetic appeal and added taste.
Step-by-step explanation:
The garnish that a Moscow Mule traditionally gets is a lime wedge. This classic cocktail is often served in a copper mug, which enhances its presentation. The lime garnish is not only for aesthetic appeal but also adds a fresh, zesty flavor that complements the spicy ginger beer and the vodka in the drink.
When making a Moscow Mule, after filling the mug with ice, you pour in the vodka and ginger beer, then gently stir. The finishing touch is squeezing a lime wedge over the drink and dropping it into the mug for an extra burst of citrus flavor.