Mix the quark, mascarpone and sugar until creamy. Whip the cream with vanilla sugar until stiff and fold in.
Line a flat baking dish with half of the ladyfingers. Soak the biscuits with half of the espresso and amaretto. Spread half of the mascarpone cream on top. Layer the rest of the ingredients on top as well.
Sprinkle the finished tiramisu lavishly with cocoa and cover it in the refrigerator for several hours.