Grease the springform pan (26 cm Ø). Cream 150 g butter, 125 g sugar, vanillin sugar and 1 pinch of salt. Stir in the eggs one by one. Mix flour and baking powder, alternating with 5 tablespoons of cream. Spread into the form. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for about 25 minutes. Cooling down
Drain the cherries, collecting the juice. Mix starch and 5 tablespoons of juice. Boil up the rest of the juice. Stir in the starch and simmer for about 1 minute while stirring. Fold in the cherries, cool for 10-15 minutes
Roast ground almonds and flaked almonds separately without fat, cool. Cut the sponge cake 2 x horizontally. Close the cake ring around the 1st base. Spread with cherries, cool down
Whip 400 g cream until stiff, adding 1 cream firming agent and 2 tsp. sugar. Fold in ground almonds, up to 1 tsp. Spread 1/3 almond cream on the cherries. Place 2nd base on top. Spread the rest of the almond cream on top. Place the 3rd base on top. Chill for about 30 minutes.
Whip 300 g of cream until stiff, adding 1 cream firming agent and 1 teaspoon of sugar. Spread a thin layer of 2/3 cream on the cake. Fill the rest of the cream into a piping bag (star-shaped spout), chill
Coarsely grate the marzipan, knead with 100 g icing sugar. Roll out between 2 layers of foil to a circle (approx. 40 cm Ø). Remove the upper foil. Place the circle on the cake using the lower foil. Remove the foil and press on the marzipan. Cut off excess marzipan
Pass the jam through a sieve. Spread the edge of the cake with the jam. Press the flaked almonds and dust with icing sugar. Decorate the cake with cream tuffs, the rest ground almonds etc.