Peanut Butter Cup Bars
["1 c. peanut butter", "2 sticks melted margarine", "1 rectangle graham crackers, crushed (1 pkg.)", "3 1/2 c. powdered sugar"]
["Mix together and pat in 9 x 13-inch pan.", "Top with 1 (12 ounce) bag chocolate chips, melted.", "Chill."]
["peanut butter", "margarine", "crackers", "powdered sugar"]