1 stick butter
3/4 c. white sugar
1 tsp. vanilla
3 eggs
9 oz. whipped topping
3/4 c. peanut butter
Baked pie crust

Cream butter and sugar until light; adding 1 egg at a time, beating thoroughly after each. Fold in peanut butter. Fold in Cool Whip. Put in baked pie crust. Refrigerate overnight.