Mix bread flour, sugar, salt, and yeast in a bowl.
Add lukewarm milk and melted butter, then knead the dough.
Cover with plastic wrap and let it rise in a warm place for 1 hour.
Punch down the dough and roll it out into a rectangle.
Place the dough in a bread pan and let it rise for another 40 minutes.
Bake in a 180°C oven for 25–30 minutes.