Proof the Yeast:
Proof the yeast: Stir yeast into warm milk and let sit roughly 5 minutes until bubbly.Mix Dry Ingredients:
Mix dry ingredients: In a large bowl, combine flour, sugar, and salt. Add softened butter, eggs, and the proofed yeast mixture. Blend until a sticky dough forms.Knead the Dough:
Knead: Transfer dough to a floured work surface and knead 5–10 minutes until smooth and elastic.First Proof Dough:
First proof: Put dough in a greased bowl, cover with a damp towel, and let rise in a warm, draft-free spot for 1–2 hours until doubled in size.Shape Donuts:
Shape donuts: Roll dough to about 1/2 inch (1.25 cm) thickness. Use a donut cutter or a large glass with a smaller cutter to cut out donuts. Gather and reroll scraps, then cut again.Second Proof Donuts:
Second proof: Arrange cut donuts on a parchment-lined baking sheet, cover loosely, and let rise 30 minutes until puffy.Fry Donuts:
Fry: Heat vegetable oil in a deep fryer or heavy pot to 350°F (175°C). Fry donuts in batches, 1–2 minutes per side, until golden. Transfer to paper towels to drain.Finish with Sugar:
Finish: Sprinkle warm donuts with powdered sugar.