Vanilla buttercream bumpy cake

Sugar, water, partially hydrogenated soybean and cottonseed oils, enriched bleached flour (wheat flour, niacin, reduced iron, thiamin mononitrate, riboflavin, folic acid), soybean oil, butter (cream, salt) corn syrup, egg whites, contains less than 2%: propylene glycol mono & diesters, pecan meal, leavening (ammonium sulfate, baking soda, monocalcium phosphate, sodium acid pyrophosphate, sodium aluminum phosphate), mono & diglycerides, evaporated milk (milk, dipotassium phosphate, carrageenan, vitamin d), nonfat milk, food starch-modified, salt, natural and artificial flavor, polysorbate 60, corn starch, cellulose gum, citric acid (preservative), corn oil, dextrose, artificial color, egg yolks, glycerin, propylene glycol, sorbitan monostearate, soy lecithin, sulfites, wheat starch, xanthan gum.