Buttercream cake

Yellow cake layers 51.2% , flour 24.4% , soya oil 12.2% , vegetable fat 6.1% , egg 3.1% , milk 1.5% , wheat starch 0.8% , E500ii 0.4% , E541 0.2% , salt 0.1% , dextrose 0.0% , Modified starch 0.0% , natural and artificial flavouring 0.0% , PROPYLENE GLYCOL mono- and DIESTERS OF FATS and FATTY ACIDS 0.0% , E471 0.0% , soya lecithin 0.0% , E330 0.0% , E450i 0.0% , GUMS 0.0% , E435 0.0% , soya lecithin 0.0% , E341i 0.0% , E481 0.0% , YELLOW 5&6 0.0% , soya flour 0.0% , nph key lime decocremes buttercreme icing 0.0% , fat 0.0% , natural flavouring 0.0% , corn syrup 0.0% , E133 0.0% , E102 0.0% , corn starch 0.0% , E412 0.0% , high fructose corn syrup 0.0% , lactylic esters of fatty acids 0.0% , lemon puree 0.0% , natural and artificial flavouring 0.0% , E338 0.0% , E202 0.0% , E211 0.0% , PROPYLENE GLYCOL mono- and DIESTERS OF FATS and FATTY ACIDS 0.0% , salt 0.0%