For the syrup 1⁄4 boil up l water with 250 g sugar and cinnamon. Boil down open for about 20 minutes to a thick syrup. Stir in 25 g butter. Leave to cool for approx. 20 minutes, stirring several times.
Grease a fat pan (deep baking tray; approx. 32 x 39 cm) and dust with flour. Roughly chop the nuts. Peel, quarter, core and dice apples. Mix immediately with lemon juice.
Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: see manufacturer). Cream 250 g butter, 200 g sugar, vanilla sugar and 1 pinch of salt with the whisks of the mixer. Stir in the eggs one by one.
Mix 450 g flour and baking powder, stir in alternately with the milk.
Smooth the dough on the fat pan. Approx. 1⁄3 Drizzle syrup on top and pull lightly through the dough with a fork. Possibly smooth the dough again. Spread the apples on it and press them on a little.
Sprinkle with nuts, 1⁄3 sprinkle syrup over it. Bake in a hot oven for 25-30 minutes. Remove the cake and let it cool down. Add the rest of the syrup and drizzle over the cake as desired.