Fill a cocktail shaker with ice and pour the reposado tequila, cranberry juice, and lime juice.
Pour:
Place ice cubes inside a copper mug and strain the cocktail through the strainer over the ice cubes.
Pour ginger beer over the cocktail and stir with a spoon.
Garnish:
Garnish with a lime wedge, a few cranberries, and a sprig of rosemary if desired.
Notes
You can make this cocktail with blanco or silver tequila.
Make a pitcher of this iconic drink, serving 6, by increasing the quantities to 1 ½ cups tequila, 1 ½ cups cranberry juice, 3 ounces of lime juice, and 24 ounces of ginger beer. Pour all ingredients into the pitcher, add ice, stir, and serve!