Ingredients:
1 pound powdered sugar
1/4 pound margarine (1 stick)
6 ounces milk chocolate

Directions:
Melt margarine in a small saucepan. Remove from heat and stir in peanut butter. Transfer mixture to a mixing bowl and gradually add powdered sugar. Stir until mixed well and press into a pie pan. Melt chocolate and spread over top. Chill.

See also:
Peanut Butter Balls
Peanut Butter Pinwheels
Peanut Brittle
Chocolate and Peanut Butter Truffles
Candy Peanut Butter Crumble Bars