Cosmopolitan Champagne Cocktail
1 1/4 cups Cointreau
1 1/4 cups cranberry juice cocktail
1/2 cup + 2 Tbsp. fresh lime juice
3 Tbsp. superfine granulated sugar
4 cups chilled champagne
Stir together Cointreau, juices, and sugar; Cover and chill for 2-6 hours. Divide among 10 champagne flutes and top off with champagne.