How to make
Arrange the biscuits along the bottom of an oiled oven dish. If necessary, break a few of them into pieces to fill any empty areas tightly.
On top, arrange the peeled, cleaned and thickly sliced apples.
Pour on the melted butter, sprinkle with cinnamon and walnuts and finally pour on the cake dough.
Bake in a preheated 360°F (180 °C) oven for about 25 min. Cool the cake and sprinkle it with powdered sugar.