01 -
Stir together baking powder, baking soda, nutmeg, salt, flour, and cinnamon in a big bowl, then set this mix aside.
02 -
Whip together the sugar, butter, and egg yolks using a hand mixer on medium speed for a couple of minutes until creamy and airy.
03 -
Stir the sour cream into the butter-and-sugar combo, mixing until smooth and fully blended.
04 -
Slowly fold the dry ingredients into the wet mixture, keeping your mixer on low speed. Stop as soon as it comes together; over-mixing makes tough donuts.
05 -
Wrap the dough in plastic and pop it in the fridge for an hour or more. This helps firm it up so it’s easier to work with later.
06 -
Roll the dough (about 1 cm thick) on a floured countertop. Use a donut cutter to punch out the donuts and holes. For that signature look, try cutting three tiny triangles into the edge of each donut before frying.
07 -
Heat oil in a deep fryer or heavy pot to exactly 350°F (use a thermometer to keep it steady).
08 -
Carefully lay the donuts into the hot oil, a few at a time. Let them fry for about 1 to 1½ minutes per side, flipping once. Holes will cook faster.
09 -
Lift the donuts out using a slotted spoon and lay them on paper towels to soak up any extra oil. Let them cool slightly before glazing.
10 -
Whisk together milk, powdered sugar, and salt in a bowl until creamy. Adjust the thickness as you go—add a little milk or sugar if it’s not right.
11 -
Gently dip the tops of the warm donuts into the glaze and let the excess drip off. Place them on a wire rack over a tray to catch drips, and give the glaze a little time to set up before eating.