Grease a well-closing springform pan (26 cm Ø; approx. 8 cm high) and dust with flour. Mix flour, 30 g starch and baking powder. Melt butter at low heat. Separate 4 eggs.
Beat 4 egg yolks with a hand mixer for about 3 minutes until creamy. Add 75 g sugar and 1 packet of vanilla sugar and continue beating for approx. 5 minutes. Sift the flour mixture on top and stir in briefly. Stir in the melted butter briefly.
Beat the 4 egg whites and 1 pinch of salt until stiff, adding 2 tablespoons of sugar. Approx. 1⁄3 Stir the beaten egg white into the egg yolk dough. Fold in the rest of the beaten egg white in portions. Brush into the mould. Pre-bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 15 minutes.
Leave to cool in the mould (the base of the cake sinks slightly).
Seal the outside of the mould with aluminium foil (see tip). Mix 200 g cream cheese, 100 g sugar and 30 g starch for approx. 3 minutes. Stir in the rest of the cream cheese. At the highest setting, stir in 225 g sugar and 1 packet of vanilla sugar.
Stir in 3 eggs and sour cream briefly. Spread into the tin on the pre-baked cake base.
Place a springform pan wrapped in foil in a fat pan filled with hot water so that the water is about 2.5 cm high at the sides. Bake in a preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) 1 1⁄4-1 1⁄2 for hours.
Remove from the oven, remove aluminium foil. Let the cake cool in the mould for about 1 hour at room temperature, then put it in the fridge for at least 4 hours.
Remove the cake from the mould. Drain the berries, collect the juice and fill up with water at 1⁄2 l. Remove 6 tbsp. of juice, mix with 2 tbsp. of sugar and pudding powder. Boil up the rest of the juice. Stir in the pudding powder and simmer for about 1 minute while stirring.
Pull off the stove. Fold in the berries. Cool down for about 5 minutes. Spread on the cake from the middle. Chill for about 1 hour.