Double Delicious Cookie Bars
["1/2 c. margarine or butter", "1 1/2 c. graham cracker crumbs", "1 (14 oz.) can condensed milk (not evaporated)", "1 (12 oz.) pkg. semi-sweet chocolate chips", "1 c. peanut butter chips"]
["Preheat oven to 350\u00b0 (325\u00b0 for glass dish).", "In a 13 x 9-inch pan, melt margarine in oven.", "Sprinkle crumbs evenly over margarine.", "Pour condensed milk over crumbs.", "Top with chips; press down firmly.", "Bake for 25 to 30 minutes, until lightly brown.", "Cool and cut into bars.", "Store at room temperature."]
["margarine", "graham cracker crumbs", "condensed milk", "semi-sweet chocolate chips", "peanut butter"]