Mix the flour with the baking powder and add the butter. Knead a crumbly dough. Let it cool briefly.
Form a layer in a suitable dish, lifting the sides carefully and forming a wall.
Beat the eggs with the sugar and add them to the cottage cheese. Add the vanilla sugar as well. Pour the mixture into the form and smooth it out.
Bake the cheesecake for about 45 min. at 374°F (190 °C).