Clean and stone the cherries. Whip 200 sugar, vanilla sugar and fat with the whisk of the hand mixer until thick and creamy. Gradually add the eggs. Mix flour, salt and baking powder, sieve on top and stir in alternately with 5 tablespoons of milk. Line a baking tray (28 x 40 cm) with parchment paper and place half the dough on top.
Brush smooth. Stir cocoa, 25 g sugar and 3 tablespoons of milk until smooth and stir into the remaining dough. Pour in irregular blobs onto the light-coloured dough. Spread the cherries irregularly on the dough. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 30 minutes. In the meantime warm up the cherry jelly. Take the cake out of the oven. Place on a cake rack and sprinkle the cherries with jelly. Let the cake cool down completely and sprinkle with sugar crystals.
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 30 minutes. In the meantime warm up the cherry jelly. Take the cake out of the oven. Place on a cake rack and sprinkle the cherries with jelly. Let the cake cool down completely and sprinkle with sugar crystals. Whipped cream tastes good with it