In the bowl of your stand mixer, combine water, all-purpose flour, sugar, salt, baking powder, fresh yeast, and salted butter.

Using the hook attachment, mix on slow for 5 minutes to bring the dough together.

After 5 minutes, increase the speed to medium-fast and let the dough mix for 15 minutes.

Divide the dough into 2 equal pieces. Flatten into thin, long rectangles and wrap them tightly in plastic wrap. Chill the dough in the refrigerator until they are completely cold.

Mix softened butter, sugar, brown sugar, cinnamon, vanilla sugar, and salt until smooth and well combined.

Roll out each chilled dough into a very thin, very long rectangle.

Roll up the dough tightly from the longer side, creating a log.

Cut the log into 50g slices and place them on a tray lined with parchment paper.

Proof, covered in plastic, for 30 minutes.

While proofing, beat an egg for egg wash and mix the brown sugar and boiling water together to make simple syrup.

Bake them in a 200C/400F oven for 4-5 minutes or until golden brown.

As soon as they are out of the oven brush with the brown sugar syrup.

Let cool before enjoying.