Payday Bars
["1 pkg. white or yellow cake mix", "1/2 c. margarine, at room temperature", "1 egg", "3 1/2 c. miniature marshmallows"]
["Mix first 3 ingredients together and spread in a 9 x 13-inch pan.", "Bake at 350\u00b0 for 12 to 15 minutes or until light brown. Remove from oven and spread miniature marshmallows on top of crust.", "Return to oven until marshmallows are melted.", "Remove from oven."]
["white", "margarine", "egg", "marshmallows"]