1 graham cracker pie shell (ready baked)
1 (6 oz.) can frozen limeade, defrosted
1 (9 oz.) container whipped topping
1 can Bordens condensed milk
Green food coloring (5 or 6 drops)

Mix milk and limeade until smooth. Fold in whipped topping and blend well. Color to suit. Pour in pie shell and chill.