White Cake Iced With Vanilla Buttercreme

Cake (cake base [sugar, rice flour, natural & artificial flavor, food starch-modified, egg whites, leavening {baking soda, sodium acid pyrophosphate, monocalcium phosphate}, mono & diglycerides, natural flavor, polyglycerol esters of fatty acids, potato starch, salt, soluble corn fiber, xanthan gum], water, soybean oil, whole egg), icing (powdered sugar, partially hydrogenated vegetable oil [soybean &/or palm oil], water, mono & diglycerides, polysorbate 60, salt, polyglycerol esters of fatty acids, potassium sorbate & sorbic acid [preservatives], dextrose, citric acid, propylene glycol, artificial flavors, ethyl maltol [flavor enhancer])