Line a mould (20 cm Ø) with baking paper. Preheat oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2).
Separate eggs. Beat the egg whites and 1 pinch of salt until stiff, adding 80 g sugar and vanilla sugar. Fold in egg yolk. Sift the flour, starch, cocoa, cinnamon and baking powder onto the egg mixture and carefully fold in with a whisk.
Smooth the sponge cake mixture into the mould. Bake in a hot oven for 20-25 minutes.
Take the sponge out of the oven. Remove immediately from the edge of the springform pan. Let it cool down a little, take it out of the tin and carefully remove the baking paper. Let it cool down.
For the filling, drain the cherries and collect the juice. Take off 5 tablespoons of juice. Stir with 2 tablespoons sugar and pudding powder until smooth. Boil up the rest of the cherry juice. Stir the pudding powder into the juice, bring to the boil and simmer for 1 minute while stirring.
Take it off the stove. Stir in the cherries, let it cool down.
Whip the cream until stiff and allow the vanilla sugar to trickle in. Cut the sponge twice horizontally and soak each base with 3 tbsp. kirschwasser. Place the bottom cake layer on a cake plate and place a cake ring around it.
Spread half the cherries on top. Spread the stewed cherries with cream as thick as a finger. Place the middle cake layer on top. Spread the rest of the compote on top. Spread the cream again as thick as a finger. Finish with the third base.
Chill for about 3 hours.
Loosen the cake ring and loosely spread the remaining cream all around the cake.