Raspberry Beer Cocktail

Ingredients

3/4 cup frozen raspberries
3 1/2(12-oz) bottles beer, chilled
1(12-oz) container frozen raspberry lemonade concentrate, thawed
1/2 cup vodka Garnish: lemon and lime slices

Directions
Stir together the first 4 ingredients. Serve over ice. Garnish, if desired. *Fresh raspberries may be substituted. Note: To Make ahead, stir together lemonade concentrate and vodka in a large container. Chill up to 3 days. Stir in raspberries and beer just before serving. Garnish, if desired.