1 (8 oz.) pkg. cream cheese (softened)
1 c. peanut butter
1 c. powdered sugar
1 (8 oz) container Cool Whip (thawed)
1 prepared graham cracker crust

In a large bowl beat cream cheese until fluffy. Beat in peanut butter and sugar. Fold in Cool Whip. Spoon into crust. Refrigerate until chilled (at least 5 hours).