Birthday cake cookies with birthday cake flavored vanilla and chocolate icing

sugar 52.1% , wheat flour 24.0% , Margarine 12.0% , water 6.0% , egg 3.0% , contains 2% and less of 1.5% , rice flour 0.7% , palm kernel oil 0.4% , palm oil 0.2% , skimmed milk powder 0.1% , cocoa 0.0% , natural and artificial flavouring 0.0% , Raising agent 0.0% , modified corn starch 0.0% , maltodextrin 0.0% , salt 0.0% , E435 0.0% , Colour 0.0% , soya lecithin 0.0% , E407 0.0% , E466 0.0% , confectioner's glaze 0.0% , E281 0.0% , E903 0.0%