Carefully melt the chocolate with the butter in a water bath while stirring. Beat 2 eggs with the brown sugar until frothy, add the chocolate mixture and mix everything with the flour.
Mix the Philadelphia with sugar, vanilla sugar and 1 egg in a second bowl.
Put the chocolate dough in a baking pan (23 x 23 cm), spread the cream cheese cream on top and marble with a fork.
Bake for about 25 minutes. After cooling, cut into small pieces.