The Original Lemon Loaf Cake

Cake mix (sugar, enriched flour bleached [wheat flour, niacin, iron thiamin mononitrate, riboflavin, folic acid], soybean oil, corn starch-modified, whey, propylene glycol monoesters of fatty acids, mono and diglycerides, leavening [baking soda, sodium aluminum phosphate], vital wheat gluten, salt, sodium stearoyl lactylate, guar gum, xanthan gum, natural and artificial flavor, egg, soy flour), egg, lemon filling (water, sugar, dextrose, food starch-modified, palm oil, contains 2% or less of the following: sodium citrate, lemon puree, citric acid, salt, natural and artificial flavor, sorbic acid, agar agar, yellow 5, blue 1, yellow 6), water, sugar, vegetable shortening (palm and canola oil), natural flavor (water, propylene glycol, xanthan gum, citric acid, sodium citrate, polysorbate 80, sodium benzoate), palm and palm kernel oil, potassium sorbate preservative, milk, whey powder, cultured buttermilk, lactose, sodium benzoate preservative, soya lecithin (an emulsifier), artificial color (water, high fructose corn syrup, glycerine, yellow 5, sugar, food starch-modified, yellow 6, carrageenan, potassium sorbate preservative, sodium benzoate preservative, citric acid, xanthan gum), methyl paraben preservative, propyl paraben preservative, natural flavor, soy lecithin.