Blueberry-Pineapple Champagne Sparklers: 1 cup blueberries 1 cup pineapple juice 2 teaspoons chopped mint leaves superfine sugar, as needed 1 bottle champagne Puree blueberries, pineapple juice and mint in a blender. Taste for tartness. If needed, blend in sugar to taste. Strain. Pour 2-3 tablespoons juice into flutes and slowly top with champagne.