Mix strong flour, sugar, and salt in a bowl.
Add milk, yeast, and butter, then knead the dough.
Let the dough rise for the first fermentation.
Divide the dough into 6 portions and shape them into balls.
Roll out each ball with a rolling pin and cut into triangles.
Place butter at one end and roll it up.
Sprinkle salt on the surface of the dough.
Let the dough rise for the second fermentation.
Bake in a preheated oven at 180°C for 15 minutes.