Mix the dry ingredients well for the batter. Then gradually stir in the moist ingredients. Put the batter in a greased springform pan.
For the topping, peel, core and quarter the apples. Cut the apple wedges several times with a knife on the top and place them on the dough. Bake for 1 hour at 180 ° C (top / bottom heat). After cooling, sprinkle with powdered sugar.