|Frozen lemonade concentrate||6 Ounce, thawed and undiluted (1 Can)|
|Frozen limeade concentrate||6 Ounce, thawed and undiluted (1 Can)|
|Powdered sugar||1⁄2 Cup (8 tbs), sifted|
|Ice||3 1⁄4 Cup (52 tbs), crushed|
|Club soda||1 1⁄2 Cup (24 tbs), chilled|
Combine lemonade and limeade concentrates, powdered sugar, and crushed ice in a large plastic container, and stir mixture well.
Remove mixture from freezer 30 minutes before serving.
Spoon mixture into container of an electric blender; add club soda.
Top with cover, and process until smooth.
Pour into glasses; garnish with lime, if desired.