1 (9 inch) graham cracker crust
1 (6 oz.) can frozen limeade
1 (10 oz.) Cool Whip
1 can sweetened condensed milk
12 to 15 drops green food color

Beat Cool Whip at high speed while adding thawed limeade slowly. Slowly add milk. Add color and pour into crust. Chill for 1 hour.

This makes 2 pies in bought graham cracker crusts.