Prepare the Dough: In a mixing bowl, combine the warm milk and sugar. Sprinkle the yeast over the milk mixture and let it sit for about 5 minutes until it becomes frothy.

Add the salt, egg, and softened butter to the yeast mixture. Mix well.

Gradually add the flour, mixing until a dough forms.

Knead the dough on a floured surface for about 10 minutes until it becomes smooth and elastic.

Place the dough in a greased bowl, cover it with a damp cloth, and let it rise in a warm place for about 45 minutes, or until it has doubled in size.

Form the Donuts: After the dough has risen, punch it down to release any air bubbles.

Divide the dough into 12 equal parts. Roll each part into a ball.

Roll out each ball slightly and use your fingers or a small cutter to create a hole in the center, forming a donut shape.

Place the shaped donuts on a baking sheet and cover them with a cloth. Let them rise for another 30 minutes.

Fry the Donuts: Heat a large amount of oil in a deep fryer or a heavy-bottomed pot to 175°C (350°F).

Carefully add the donuts to the hot oil, a few at a time, making sure not to overcrowd the pot.

Fry each donut for about 2-3 minutes on each side, or until they are golden brown.

Use a slotted spoon to remove the donuts from the oil and place them on a paper towel-lined plate to drain excess oil.

Finish and Serve: While the donuts are still warm, sprinkle them generously with sugar.

Serve immediately and enjoy!