01 -
Sift together the all-purpose flour, baking powder, baking soda, ground cinnamon, freshly grated nutmeg, and salt in a medium bowl. Set aside.
02 -
In a large bowl, beat the granulated sugar and softened butter until light and fluffy, approximately 2 minutes. Add the egg yolks and continue beating until well combined and slightly increased in volume.
03 -
Mix in the sour cream to the sugar, butter, and egg yolk mixture until fully smooth.
04 -
Gradually add the sifted dry ingredients to the wet mixture, 2–3 tablespoons at a time, blending just until combined. Avoid overmixing; the dough should be soft and slightly sticky.
05 -
Wrap the dough tightly in plastic wrap and refrigerate for at least 1 hour, or up to 1 week.
06 -
Lightly flour the work surface and roll out the chilled dough to a thickness of 1 cm. Use a pastry brush to remove excess flour.
07 -
Using a donut cutter or two round cutters (approximately 8 cm and 3 cm), cut out the donuts and centers. Gather and re-roll scraps as necessary.
08 -
Pour oil into a deep fryer or large, heavy pot to a depth of at least 5 cm and heat to 175°C.
09 -
Fry 2–3 donuts at a time, turning once, until golden brown, about 1 to 1½ minutes per side. Fry donut holes separately, as they cook faster. Remove with a slotted spoon and drain on a wire rack lined with paper towels.
10 -
Allow the fried donuts to cool slightly before glazing.
11 -
In a medium bowl, whisk together the sifted powdered sugar, whole milk, and salt until a smooth glaze forms. For a thinner consistency, gently warm over a bain-marie while whisking.
12 -
Dip the cooled donuts into the glaze, allowing excess to drip off. Place on a wire rack to set.