Melt the chocolate and butter and mix together. Beat 2 eggs with 200 g sugar until frothy. Stir in vanilla extract, chocolate-butter mixture, flour and salt. Spread the dough on an approx. 18 x 27 cm tray.
Mix the cream cheese with the third egg, 70 g sugar and vanilla sugar until smooth. Spread on the dough in a wave shape with a fork, creating a marble pattern
Bake in the middle of the oven at 220 degrees for about 25 minutes so that the cake is still slightly moist on the inside. After cooling, cut into small pieces.