Microwave Fudge
["2 c. margarine", "3 c. peanut butter", "1 (12 oz.) pkg. chocolate chips", "2 lb. powdered sugar"]
["Melt margarine, peanut butter and chocolate chips in microwave for 3 minutes.", "Add sifted powdered sugar gradually.", "Spread in a 9 x 13-inch pan and refrigerate."]
["margarine", "peanut butter", "chocolate chips", "powdered sugar"]