Coarsely chop the dark chocolate and melt it over a warm water bath. Whisk butter, sugar, salt and vanilla sugar in a mixing bowl with the whisk of the hand mixer until creamy
Stir in the eggs one by one. Stir in liquid chocolate. Mix flour, cocoa and baking powder and stir in alternately with liqueur and milk. Pour the dough into a greased springform pan (20 cm Ø), dust with flour. Bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 40 minutes. Take out and let cool down for about 2 hours
Sort the blackberries, wash and drain them. Puree 150 g blackberries and pass through a sieve. Remove the chocolate base from the springform pan and cut through horizontally 3 times. Whip cream cheese, cream and icing sugar until creamy. Stir the blackberry puree in streaks into the cream cheese. Place the bottom cake layer on a cake platter and enclose with a cake ring. Alternately layer cream and cake bases, finish with cream. Chill for at least 2 hours
Crush 50 g blackberries with a fork. Peel the chocolate with a peeler into small rolls. Remove the cake from the ring and decorate with bromeberries and chocolate
waiting time 4 hours