Add lime juice to mug, followed by vodka, cranberry juice, and ginger beer.
Mix well, then garnish with cranberries and rosemary, if desired.
Serve immediately. Enjoy!
Notes
To make Cranberry Moscow Mules by the pitcher, use the following proportions:
¼ part lime juice
1 part vodka
1 part cranberry juice
2 parts ginger beer
For example, if you use 1 cup vodka, you will also need 1 cup cranberry juice, 2 cups ginger beer, and ¼ cup lime juice.You can mix up the other ingredients ahead of time, but I would add the ginger beer just before serving to maintain its carbonation.