Bring 440 ml milk to the boil. Stir pudding powder, 45 g sugar and 6 tbsp milk until smooth. Stir into the boiling milk, bring to the boil and simmer for about 1 minute. Remove from the heat, pour into a bowl and cover with foil. Let the pudding cool down, then chill for at least 2 hours, preferably overnight
Separate 3 eggs. Beat the egg whites, 1 packet of vanillin sugar and 75 g sugar with the whisks of the hand mixer until stiff. Stir in the egg yolks. Mix starch, 2 tbsp. flour and cocoa and fold in carefully. Line the bottom of a springform pan (26 cm Ø) with baking paper. Fill in sponge cake mixture and smooth it down. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for about 14 minutes. Take out, turn onto a cake rack, remove baking paper, let the cake cool down
Bring 50 ml milk, 50 ml water, butter and salt to the boil in a saucepan. When the fat is completely melted, add 80 g flour at once. Stir with a wooden spoon until a white layer forms on the bottom of the pot and the dough comes off the bottom of the pot as a lump. Pour into a bowl and immediately stir in 1 egg. Let it cool down for about 5 minutes. Stir 1 egg into the dough
Using a cake ring, draw a circle (25 cm Ø) on a piece of baking paper. Turn over the baking paper and place it on a baking tray. Pour the dough into a piping bag with a central perforated spout. Spray irregular spots into the marked circle. In a preheated oven (electric cooker: 225 °C/ circulating air: 200 °C/ gas: see manufacturer) for approx. 20 minutes. Remove from the oven and let cool down
Soak gelatine in cold water. Drain the cherries, let them drip off and put some nice ones aside for decoration. Whip the cream until stiff, adding 1 packet of vanilla sugar and 1 tbsp. sugar. Stir cooled vanilla pudding with a whisk until smooth. Gradually fold in the cream. Squeeze the gelatine, dissolve and stir in 4 tbsp. of the vanilla cream, stir into the remaining vanilla cream. Fold in cherries
Remove the sponge cake from the mould, place it on a cake plate and enclose it with a cake ring. Smooth the cream pudding over it and put the choux pastry lid on. Chill for at least 3 hours
Remove the cake from the cake ring, dust with some cocoa powder and decorate with the cherries that have been set aside
waiting time approx. 3 3/4 hours