Whisk together the egg yolk, vanilla yoghurt and milk before adding the dry ingredients and mixing well to form a slightly sticky dough.
3
Flour a worktop and press the dough 1-2 cm flat before pressing a glass or donut mold into the dough to shape them.
4
Transfer the donuts to a baking tray and brush with egg (the brushing can be omitted). Bake on the middle rack in the oven for approx. 10-15 minutes or until you get a golden crust.
5
Melt the chocolate and dip the donuts in the melted chocolate when they have cooled.