1 pkg. crushed graham crackers
3 c. powdered sugar
1 c. melted butter
1 1/2 c. smooth peanut butter

FROSTING:

12 oz. chocolate chips
1/4 c. milk
3 tbsp. butter

Bars: In large bowl, stir together cracker crumbs and sugar; add 1 cup melted butter and peanut butter with electric mixer until well blended. Press mixture into 9x13 inch pan.

Frosting: Melt chocolate chips, butter with milk in small saucepan; stir until mixture is smooth. Pour over peanut butter mixture - tilt pan to spread evenly. Chill until firm.