¼ cup water
¼ cup white sugar
1 tablespoon chopped fresh mint leaves
2 cups crushed ice
½ cup prepared lemonade
fresh mint sprigs, for garnish
Combine water, sugar, and 1 tablespoon of chopped mint in a small saucepan; cook and stir until mixture has boiled and sugar has dissolved. Remove from heat and set aside to cool for about an hour; strain out mint leaves.
Fill cup with crushed ice. Pour lemonade into each glass and add desired amount of cooled sugar syrup. Garnish each with a mint sprig and a straw.