1/4 Sheet White Cake with Colored Icing

white cake sugar, bleached enriched flour wheat flour, niacin, reduced iron, thiamine mononitrate, riboflavin, folic acid, eggs, soybean oil, water, egg whites, nonft dry milk, high fructose corn syrup, modified food starch, salt, baking soda, propylene glycol esters, sodium aluminum phosphate, corn syrup, sorbitan monostearate, natural and artificial flavor, polysorbate 60, sodium stearoyl lactylate, cellulose gum, xanthan gum, guar gum, mono and diglycerides, sodium benzoate and benzoic acid, soy lecithin, frosting sugar, partially hydrogenated soybean and cottonseed oil, water, cornstarch, mono and diglycerides, salt, artificial flavor, polysorbate 60, high fructose corn syrup, glycerine, artificial colors fd c blue 1, red 3, yellow 5, yellow 6, modified food starch, carrageenan, potassium sorbate and sodium benzoate, citric acid, xanthan gum, methyl and propyl paraben