In a large bowl, mix the warm milk and sugar. Sprinkle in the yeast and let it sit for 5 minutes until frothy.
Combine Wet Ingredients
Whisk in melted butter and the egg until smooth and well combined.
Form the Dough
Gradually add flour and salt, mixing until a workable dough forms.
Knead the Dough
Knead for 5–7 minutes until smooth and elastic.
First Rise
Place the dough in a greased bowl, cover, and let rise in a warm spot for about 1 hour or until doubled in size.
Shape the Donuts
Punch down the dough, roll it out to ½-inch thickness, and use a heart-shaped cutter to make donuts.
Second Rise
Let the cutout donuts rise for another 30 minutes.
Fry the Donuts
