Grease the fat pan of the oven (approx. 32 x 39 cm; at least 3.5 cm deep). Cream butter, sugar, vanilla sugar, gingerbread spice and 1 pinch of salt with the whisk of the hand mixer.
Stir in 4 eggs one after the other. Mix flour, cocoa and baking powder, sieve on top and stir in briefly.
Spread the dough on the fat pan. Stir the raspberry jam until smooth, pour onto the dough and spread evenly, e.g. with a cake server.
Beat 7 egg whites and 1 pinch of salt until stiff. Gradually add 200 g icing sugar while continuing to beat. Add ground almonds to the beaten egg white (photo) and spread the beaten egg white loosely on the jam.
Bake the cake in the preheated oven (electric oven: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 25 minutes. Let them cool down. Dust with icing sugar and cut into pieces.