Beat eggs with sugar, add softened butter and warm milk, mix until smooth. Mix flour with salt and dry yeast, add to the creamy egg mass and knead the dough. Roll the dough into a ball, put it in a bowl, cover with cling film and leave for 1 hour in a warm place so that the dough rises. During the rise, beat the dough 2 times so that it is saturated with oxygen and becomes lush.