Take the puff pastry out of the refrigerator 10 minutes before processing. Spread out on a floured work surface.
Separate the eggs. Mix the egg yolks, layered cheese, mascarpone, vanilla sauce powder, vanilla sugar and sugar in a mixing bowl with the mixer to form a smooth mass. Beat the egg white until stiff and fold it carefully into the curd mixture.
Cut out circles approx. 11 - 12 cm in diameter from the dough sheets. Place the remaining edges of the dough on top of each other, roll out and cut out further circles. Grease the hollows of a muffin tin, place the dough circles in the hollows and spread the quark mixture on top.
Preheat the oven to 200 ° C, fan-assisted 175 ° C. Bake the tartlets for about 20 minutes.
Take out, let cool down and after approx. 10 minutes take out of the mold and let cool down.