Add the flour, salt, powdered sugar, cardamom, cinnamon, [yeast and vanilla sugar into a bowl and combine the content well. Make a well into the center and continue to add in the wet ingredients: Milk and Butter.
Mix the whole content well and work out into a smooth dough.
Cover the dough ball with some flour and a cloth, keep standing in a warm place to rise for an hour.
Just before you take out the dough, preheat the oven to 390° Fahrenheit/200° Celsius.
Once the dough has risen, work it out again. Roll out the dough into 1 cm thickness. Add the poppy seed paste and spread all over an equal layer.
Now carefully roll in and seal the ends.
Butter a fitting mold and place the uncooked cake into it. Let it stand for another 15 minutes to rise.
Bake in the oven at 390° Fahrenheit/200° Celsius for about 35 minutes. Test with a toothpick by pocking into the cake to see if it's done.
Once baked, directly brush the cake surface with the melted butter and dust at the end with powdered sugar.