In a mixing bowl, dissolve the sugar in warm water and add the yeast, allowing it to proof until foamy.

Add the melted butter, salt, and 2 cups of flour to the yeast mixture and mix well.

Gradually add the remaining flour, mixing until a dough forms.

Knead the dough on a floured surface until smooth and elastic, about 8 minutes.

Place the dough in a greased bowl, cover it with a cloth, and let it rise in a warm place until doubled in size, about 1 hour.

Punch down the dough and divide it into 12 equal pieces, shaping each piece into a roll.

Place the rolls on a parchment-lined baking sheet, cover, and let rise for another 30 minutes.

Preheat the oven to 375°F (190°C).

Brush the tops of the rolls with a mixture of beaten egg and milk.

Bake in the preheated oven for 12-15 minutes or until golden brown.

Allow the rolls to cool slightly before serving.