Tasty Mandarin Orange Pineapple Cake !! ingredients: 1 box Duncan Hines Butter Cake mix 1/2 cup Wesson oil 1 11- ounce can mandarin oranges 1/2 cup sugar 4 eggs Icing 1 12 ounce tub of Cool Whip small instant vanilla pudding mix 1 16 oz. can crushed pineappleHow to make it: