Put the flour in a mixing bowl. Lightly sweeten a little milk and heat it lukewarm, dissolve yeast in it.
Pour the mixture on top of the flour and let rise until a steam appears.
In the meantime, melt the butter, add the milk, sugar and vanilla sugar and season with a little salt. Stir in the flour steamer with the eggs while still lukewarm. Knead until a fine dough is formed. Let rest for 30 minutes until the dough has risen to double its size.
Then roll out into a rectangle on a floured worktop.
For the filling, mix granulated sugar, cinnamon, vanilla sugar, raisins in rum and chopped walnuts and distribute on the dough. Roll up and place in a greased, floured bundt cake pan, let rest a little more.
Brush with butter, pierce with a fork and bake in the preheated oven at 170 ° C for about 50 minutes