Mix yeast, sugar and milk together, let rise. Knead with the other ingredients to make a smooth dough (add some milk if necessary). Place the dough in a bowl with cold water for 1 hour (if necessary wrap it with cling film, but it doesn`t have to be), do not roll out too thinly. Bake lightly at 175 ° C for about 10 minutes, then toss in icing sugar mixed with cinnamon.