Graham Cracker Peanut Butter Bars

1 18 oz jar peanut butter

3/4 c Butter

1 lb Powdered sugar

1 lb Graham crackers, crushed

12 oz Milk chocolate morsels

Graham crackers are to be coarsely crushed. Using an electric mixer, cream together peanut butter and butter until soft and smooth. Beat in powdered sugar until smooth, then beat in graham crackers. Beat until well blended and moist. Spread mixture in a 13x9x2 inch pan. Melt the chocolate morsels and pour over mixture. Refrigerate 3 or 4 hours. Cut into bars.