Is COOKIES'N CREAM CAKE vegan?

cake mix (sugar, enriched wheat flour bleached [flour, niacin, reduced iron, thiamine mononitrate, riboflavin, folic acid], palm oil, cocoa processed with alkali, dry egg whites, leavening [baking soda, sodium aluminum phosphate, tetrasodium pyrophosphate, monocalcium phosphate], dry egg yolks, nonfat dry milk, dextrose, food starch-modified, soybean oil, salt, sorbitan monostearate, propylene glycol mono & diesters of fatty acids with bht as preservative, mono & diglycerides, soy lecithin, caramel color, xanthan gum, calcium acetate, sodium stearoyl lactylate, polysorbate 60, guar gum, cellulose gum, corn starch, natural and artificial flavor, red #40, wheat starch, silicon dioxide, citric acid), water, powdered sugar, shortening (palm oil and soybean oil with mono- and diglycerides and polysorbate 60 added, tbhq and citric acid added to help protect flavor), hydrox oreo cookie (sugar, enriched wheat flour [contains niacin, reduced iron, thiamine mononitrate {vitamin b1}, riboflavin {vitamin b2}), vegetable shortening, [partially hydrogenated soybean oil], cocoa [processed with alkali], high fructose corn syrup, corn flour, whey, chocolate, baking soda, salt, soy lecithin - an emulsifier, and vanillin, an artificial flavor), margarine (palm oil, water, soybean oil, salt, mono- and diglycerides, artificial flavor, calcium disodium edta added as a preservative, vitamin a palmitate added), soybean oil, white icing base (partially hydrogenated vegetable oil [soybean and/or cottonseed and/or palm oils], dextrose, maltodextrin, nonfat milk solids, mono & diglycerides, polysorbate 60, propylene glycol, artificial flavor, cornstarch, citric acid, water), natural flavors.

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