Mix the flour with the salt, sugar, and yeast. Melt the butter with the 300 ml of milk and add to the flour mixture. Whisk 2 eggs, add to the flour mixture, mix everything well and knead on a floured surface to a soft dough.
Divide the dough into 8-10 portions, shape into balls and place on a baking tray with baking paper. Flatten the balls on the backing sheet and leave them covered for about 2 hours.
Before baking, egg wash the buns and sprinkle with sesame seeds (optional). Bake at 170°C (circulating air) or 350°F for approx. 15 min.