Marble butter pound cake

sugar 51.7% , fortified wheat flour 24.2% , whole egg 12.1% , water 6.0% , soya oil 3.0% , salted butter 1.5% , Modified starch 0.8% , fat 0.4% , wheat flour 0.2% , cocoa powder 0.1% , Emulsifier 0.0% , contains 2% and less of 0.0% , salt 0.0% , vital wheat gluten 0.0% , E471 0.0% , Raising agent 0.0% , artificial flavouring 0.0% , dextrose 0.0% , corn starch 0.0% , E435 0.0% , E481 0.0% , E466 0.0% , E412 0.0% , E415 0.0% , E263 0.0% , Preservative 0.0% , skimmed milk powder 0.0% , natural and artificial flavouring 0.0% , dairy whey 0.0% , E150a 0.0%