3 cups crushed ice
1 (6 ounce) can frozen lemonade concentrate
1 (6 ounce) can frozen limeade concentrate
1/4 cup confectioners’ sugar
2 cups chilled club soda
Pour ice, lemonade concentrate, limeade concentrate, and confectioners' sugar in a blender; blend until slushy.
Gently stir club soda into lemonade mixture to serve.