01 -
In a bowl, toss together your nutmeg, salt, cake flour, and baking powder by sifting them.
02 -
Using a stand mixer fitted with the paddle tool, mix the butter with sugar until it feels sandy. Toss in the egg yolks and beat till it’s fluffy and pale.
03 -
On low speed, take turns adding the dry mix and sour cream to the bowl, starting and ending with the flour. Blend till it’s smooth but a little sticky—if it’s too sticky, sprinkle in a spoonful of flour.
04 -
Wrap the dough tightly in plastic wrap and pop it in the fridge until it’s firm and easy to handle, about an hour.
05 -
On a floured countertop, roll the dough out to make it about half an inch thick. Cut out around a dozen pieces with a doughnut cutter or two round cutters. If it gets sticky, let it chill again.
06 -
Pour a couple of inches of oil into a sturdy pot and warm it up to 325°F with a deep-fry thermometer in place to track the heat.
07 -
Carefully fry a handful of doughnuts at a time. Flip them after 2 minutes per side. Keep the oil at the right temperature and blot off extra oil on brown paper bags after frying.
08 -
Mix together hot water, vanilla, sifted powdered sugar, corn syrup, and salt in a bowl till it looks smooth and shiny.
09 -
Dip the freshly fried doughnuts into your glaze. Let them drip on a rack set over a tray till the glaze sets—about 20 minutes.