Chocolate Peanut Butter Bars
["2 c. powdered sugar", "2 c. graham cracker crumbs", "1 c. smooth peanut butter", "1/2 c. plus 2 tbsp. Butter, melted", "2 c. (12 oz.) semi-sweet or milk chocolate chips, melted"]
["Mix sugar, crumbs, peanut butter, and butter until well blended.", "Scrape into a 9x13 inch ungreased pan; press into an even layer.", "Spread melted chocolate over top.", "Refrigerate for 2 hours.", "Let stand at room temperature 15 to 20 minutes before cutting bars."]
["powdered sugar", "graham cracker crumbs", "smooth peanut butter", "Butter", "semi-sweet"]