Add vodka, cranberry juice, and lime juice to the shaker.
If using fresh ginger, muddle it gently in the shaker.
Shake the mixture for 15-20 seconds until well chilled.
Fill a highball glass with fresh ice.
Strain the mixture into the glass.
Top with ginger beer and stir gently with a bar spoon.
Garnish with fresh cranberries and a lime wedge.
Notes
The drink can be made sweeter by using cranberry juice cocktail instead of pure cranberry juice.Fresh ginger adds extra spice, but it's optional. The ginger beer provides enough kick on its own.Store-bought cranberry juice works well, but fresh-pressed juice creates a more intense flavor.This recipe serves one person. Double or triple the ingredients to make multiple servings.Keep the ginger beer cold before mixing to maintain maximum fizz in the cocktail.