Homemade cinnamon sugar cake donuts with a lightly crisp exterior and a tender, cake-like center. These fried donuts are made without yeast and coated in cinnamon sugar while still warm.
In a large mixing bowl, beat the eggs until light and bubbly. Add the sugar and mix until combined.
2 large eggs, ½ cup sugar
Add the sour cream and vanilla to the egg mixture. Mix until smooth and combined.
½ cup sour cream, ½ teaspoon vanilla
In a separate bowl, whisk together the flour, baking powder, baking soda, salt, cinnamon, and nutmeg.
2 cups flour, 2½ teaspoons baking powder, ½ teaspoon baking soda, ½ teaspoon salt, ½ teaspoon ground cinnamon, pinch ground nutmeg
Gradually add the dry ingredients to the wet ingredients, mixing just until most of the flour is incorporated. Use a silicone spatula to gently fold in the remaining flour. The dough will be wet and sticky. This is normal!
Transfer the dough to a piece of plastic wrap and shape it into a flat rectangle or square. Wrap tightly and refrigerate for 1–2 hours. Chilling makes the dough easier to roll and cut.
Place the chilled dough on a generously floured surface. Sprinkle a little flour over the top and gently roll into a 10-inch square. Lift the dough occasionally and add more flour underneath as needed to prevent sticking.
Dip a donut cutter into flour and cut out the donuts. Flour the cutter between cuts to prevent sticking. Gather the scraps and gently reroll to cut additional donuts.
Heat 1–2 inches of vegetable or canola oil in a heavy-bottomed pot to 375°F. Use a thermometer to monitor the temperature.
Carefully lower a few donuts into the hot oil, leaving enough room between them. Fry for approximately 2 minutes per side, until golden brown and cooked through. Transfer to a wire rack to drain. Allow the oil to return to 375°F before frying the next batch.
While the donuts are still warm, roll them in homemade cinnamon sugar until evenly coated. The warmth helps the coating stick to the donuts. Serve fresh!
⅔ cup sugar, 2 teaspoons ground cinnamon
Notes
Chill the dough. The dough is quite sticky when first mixed. Refrigerating it for 1–2 hours makes it easier to roll and cut without adding too much extra flour.
Use flour when rolling. Lightly flour your work surface, rolling pin, and donut cutter to keep the dough from sticking. Add more flour only as needed.
Monitor the oil temperature. Keep the oil as close to 375°F as possible. Oil that's too hot will brown the donuts before the centers cook, while oil that's too cool can make them greasy.
Don't overcrowd the pot. Fry just a few donuts at a time. Adding too many can lower the oil temperature and cause uneven cooking.
Coat while warm. Roll the donuts in cinnamon sugar shortly after frying so the coating sticks.
Enjoy them fresh. Homemade cake donuts have the best texture the day they're made, especially while they're still slightly warm.