Name one of the main ingredients in a Moscow Mule.

The primary ingredient in a Moscow Mule is ginger beer. This cocktail is typically made with vodka, fresh lime juice, and ginger beer, which adds a distinctive spicy and effervescent quality to the drink. The combination of these ingredients is served over ice, often in a copper mug, enhancing the overall experience with its cold temperature and aesthetic appeal.

The presence of ginger beer is crucial, as it not only provides flavor but also balances the tartness of the lime juice and the neutrality of the vodka. This classic drink showcases how ginger beer can elevate a cocktail, making it refreshing and enjoyable. Understanding this core ingredient is essential for any bartender, as it plays a vital role in the authentic preparation of a Moscow Mule.