Is 1/4 SHEET WHITE CAKE WITH BUTTERCREAM ICING, WHITE vegan?

sugar, enriched bleached wheat flour (flour, niacin, reduced iron, thiamine mononitrate, riboflavin, folic acid), vegetable shortening (palm and soybean oils, mono-and diglycerides, polysorbate 60), egg whites, soybean oil, eggs, water, high fructose corn syrup, contains less than 2% of the following: corn starch, palm and palm kernel oils, leavening (sodium acid pyrophosphate, baking soda, monocalcium phosphate), wheat starch, modified tapioca and cornstarch, propylene glycol mono- and diesters of fats and fatty acids, salt, natural and artificial flavor, whey (milk), dextrose, mono- and diglycerides, soy lecithin, sodium caseinate dextrin, guar gum, polysorbate 60, confectioner's glaze, xanthan gum, sodium stearoyl lactylate, red 40 lake, yellow 5 lake, disodium phosphate, yellow 6 lake, carnauba wax, ascorbic acid, blue 1 lake, citric acid, red 3, blue 1, red 40, rice flour, colored with (spirulina extract powder, turmeric oleoresin, vegetable juice, beta-carotene, titanium dioxide), cocoa, blue 2 lake, yellow 5, cellulose gum, gum arabic, carrageenan, yellow 6.

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