For a winning adult lemonade, try Blackberry-Vanilla Vodka Lemonade. The vanilla bean is a pleasing addition.
Serves 8 (serving size: about 3/4 cup)
Start with fresh lemon juice in a pitcher. Place blackberries and sugar in a food processor; process until blended. Press mixture through a fine sieve into pitcher with lemon juice, and discard solids. Scrape seeds from vanilla bean into pitcher. Stir in vodka, and serve over ice.