The Magic of Jell-o Recipe Book pg 81
1 pckg lime jell-o
2/3 cup boiling water
2 cups ice cubes
1 cup thawed cool whip/no name whipped topping
2 tbsp creme de menthe/1tsp mint extract
green food colouring
1 prepared graham or chocolate wafer crust
Dissolve jelly powder in boiling water, add ice stirring constantly until it starts to thicken (3-5 minutes) remove unmelted ice.
Add whipped topping and liqueur and whisk until well blended.
Spoon into crust. Chill 3 hours.