Beat the butter and sugar until frothy. Add vanilla sugar and salt and stir in. Stir in the eggs one at a time. Mix the ground hazelnuts, flour and baking powder in a bowl and carefully mix into the dough alternately with the milk. The dough must fall from the spoon with difficulty. Put the dough in a greased springform pan or pie form and smooth it out. Now place the prepared fruits according to season and choice and press a little into the dough (place the fruits close to each other!).
Bake in the preheated oven at 160 ° C to 180 ° C for about 40 minutes. Mix the sugar and almonds about 10 minutes before the end of the baking time and sprinkle over the cake.