1 box powdered sugar
2 sticks butter, melted
1 c. peanut butter
1 c. graham cracker crumbs
1 (12 oz.) pkg. chocolate chips

Mix first 4 ingredients and spread in bottom of cookie sheet. Melt chocolate chips and spread over top of peanut butter mixture. Refrigerate for 10 minutes and cut into bars. Keep in refrigerator and serve cold.