Peanut Butter Cups
["2 c. graham cracker crumbs", "1 box powdered sugar", "2 c. peanut butter", "2 sticks margarine, melted"]
["Mix well.", "Press into a 9 x 13-inch pan.", "Melt 1 stick margarine and 1 (12 ounce) package chocolate chips; pour over the top and chill."]
["graham cracker crumbs", "powdered sugar", "peanut butter", "margarine"]