Chocolate Truffle Marble Half Cake

cake mix (sugars (sugar, Dextrose), Enriched wheat flour, Cocoa powder, Modified palm oil shortening, Modified corn starch, Modified milk ingredients, Emulsifier (rice flour, Polyglycerol esters of fatty acids), Baking powder, Wheat starch, Dried egg whites (egg whites, Citric acid, Yeast), Salt, Natural flavour, Sodium stearoyl-2- lactylate, Carboxymethyl cellulose, Xanthan gum), Whipping cream (cream, Milk, Carrageenan, Plant mono and diglycerides, Cellulose gum, Polysorbate 80, Sodium citrate), Chocolaty coating (sunflower and soybean and rapeseed and palm oil, Sugar, Cocoa, Palm and palm kernel and modified palm kernel oil, Skim and/or whole milk powder, Whey powder, Lactose, Sunflower and/or soy lecithin, Natural flavour, Naturalextract), Chocolate (sugar, Cocoa mass, Cocoa butter, Milk ingredients, Sunflower and/or soy and/or canola lecithin, Milk powder, Whey powder, Lactose, Natural flavour, Butter oil), Water, Liquid whole egg, Canola and/or soybean oil, Stabilizer blend (sugar, Sodium alginate, Calcium sulphate, Calcium citrate, Sodium phosphate, Canola and sunflower oil, Tapioca starch), Modified milk ingredients, Chocolaty coated cereals (white chocolate (sugar, Cocoa butter, Milk powder, Whey powder, Soy lecithin, Natural flavour), Crisped cereals (wheat flour, Sugar, Wheat malt flour, Wheat starch, Sodium bicarbonate, Salt, Cocoa butter, Natural flavour), Glucose syrup, Sugar, Gum arabic), Xanthan gum. Contains: Wheat, Milk, Egg and soy. May contain: Oats, Barley, Rye, Triticale, Peanuts, Tree nuts, Sesame, Sulphites and mustard