Peanut Butter Pie

1 pie crust, baked and cooled
1/2 C. peanut butter
3/4 C. powdered sugar
1 large pkg. vanilla pudding and pie filling, cooked as directed for pie filling and cooled
Cool Whip

Crumble together the peanut butter and powdered sugar. Sprinkle 3/4 of this mixture on the bottom of the pie crust. Pour in pudding, top with Cool Whip and sprinkle remaining crumbs on top. Chill.