1 (9 inch) unbaked pie crust
4 (3 ounce) packages instant lemon pudding mix
4 (1 ounce) containers frozen whipped topping, thawed
Preheat oven to 375 degrees F (190 degrees C).
Combine pudding mix and 1/4 cup of the whipped topping mix in small bowl. Stir until pudding is smooth, then fold in thawed frozen whipped topping. Pour filling into crust.
Bake in preheated oven for 30 minutes.