Boston cream donuts with custard filling & decadent coating with festive leaf sprinkles

wheat flour 51.5% , water 24.2% , sugar 9.0% , vegetable fat 7.6% , soya oil 3.8% , dextrose 1.9% , Raising agent 1.0% , salt 0.4% , soya flour 0.3% , cocoa powder 0.1% , modified corn starch 0.1% , Emulsifier 0.0% , dried whey wheat gluten 0.0% , Preservative 0.0% , skimmed milk powder 0.0% , natural and artificial flavouring 0.0% , egg 0.0% , E160ai 0.0% , soya lecithin 0.0% , enzyme 0.0% , corn syrup solids 0.0% , E422 0.0% , E150a 0.0% , E171 0.0% , E575 0.0% , corn starch 0.0% , sodium acid phosphate 0.0% , E102 0.0% , E110 0.0% , E133 0.0% , E129 0.0% , sunflower lecithin 0.0% , confectioner's glaze 0.0%