Winter white bar cake with vanilla icing

Sugar, enriched flour (wheat flour, niacin, reduced iron, thiamine mononitrate, riboflavin, folic acid), eggs, palm oil, soybean oil, butter (pasteurized cream), water, cornstarch, leavening (sodium acid pyrophosphate, baking soda, monocalcium phosphate), whey, modified starch (tapioca, corn), wheat starch, cottonseed oil, cocoa butter, salt, polysorbate 60, propylene glycol mono and diesters, natural and artificial flavor, monoglycerides, dextrose, whole milk powder, palm kernel and/or palm oil, mono and diglycerides, sodium caseinate, nonfat milk, guar gum, xanthan gum, soy lecithin, milk, sodium stearoyl lactylate, disodium phosphate, ascorbic acid, citric acid, buttermilk, lactose, vanilla, natural vanilla extract