Quark Vánočka

Crumble the yeast into a mug, add a teaspoon of sugar and a tablespoon of flour. Pour in lukewarm milk and stir. Let the leaven rise in a warm place, which takes about 10 minutes.

Sift the flour into a bowl, add sugar, vanilla sugar, and a pinch of salt. Make a well in the center, pour in the risen leaven, add egg yolks, quark, and melted butter. Knead into a smooth, non-sticky dough (you can use a stand mixer with a dough hook).

Finally, fold in the raisins. Cover the dough with a clean cloth and let it rise in a warm place for about an hour, until it doubles in volume.