Source: The All-American Cowboy Cookbook

1 (12 ounce) can frozen lemonade concentrate, thawed
1 (12 ounce) can frozen limeade concentrate, thawed
1 cup confectioners' sugar
5 egg whites
6 cups crushed ice
4 cups club soda
Lime slices
Coarse salt

In a 1-gallon, nonmetal container, combine juice concentrates, sugar, egg whites and crushed ice. Mix well. Cover and freeze. Stir periodically.

Remove from freezer about 30 minutes before serving. Spoon 2 cups of the mixture into a blender and add 1 cup club soda. Blend until frothy.

To serve, rub rim of glass with a lime slice and twist rim gently in the salt. Fill glass and garnish with lime slices.

Makes 24 servings.