Measure the flour into a bowl and make a well. Sprinkle in the yeast and 1 tablespoon of the sugar, and pour over the cool milk. Flick some flour over the well to close it and cover the bowl. Leave it to rest for one hour.
After an hour, the yeast should be all foamy. At that point, all of the rest of the dough ingredients and knead well by hand or machine for 10 minutes.
Cover the bowl and let it rest for 2-4 hours until the dough has doubled in size. Alternatively, pop it in the fridge and let it sit over night.
Pull the dough out of the bowl, divide it into 12 pieces and roll each piece into a tight ball.
Place the balls, about 2 cm apart, on a baking tray that is lined with baking parchment. Cover and let rise for an hour if they are warm or 2 hours if they are cool from the fridge. They will double in size.
Preheat the oven to 220 degrees.
Mix together the ingredients for the glaze.
Glaze each bun and then pop them in the oven. Bake them for 15-20 minutes (check after 15 so they don’t get too brown - if they are getting too brown, cover them with some parchment paper.
Let them cool completely on a wire rack and then cut them in half across the bun, anywhere from 3/4 to 9/10 of the way up the bun. Spread the bottom half with a smear of jam if you would like that and then a layer of marzipan. If you want the buns to look fancy, pipe on some whipped cream, or just blob it on with a spoon. Put the hat back on the bun and dust with icing sugar. I dare you to only eat one.