Mix the flour, sugar, baking powder, eggs, butter, apples, raisins and cinnamon together well. Put the dough in a greased 26 or 28 springform pan. Cover the cake with the walnut halves.
Bake in a preheated oven at 175 ° C for about 60 minutes.
Tip: If it gets too dark, cover it with aluminum foil.
The cake can be baked a day or two beforehand because it tastes best when it is well drawn.