1-First Step: Prepare the batter – mise en place Mix dry ingredients: 2 cups flour, 1.5 cups sugar, 2 tsp baking powder, 1 tsp baking soda, and 1/2 tsp salt in a large bowl. In another bowl, whisk 2 eggs, 1 cup sour cream, and 1/4 cup milk until smooth. Combine wet into dry, stirring gently until just mixed. Avoid overmixing to keep old fashioned sour cream donuts tender. Cover and chill for 1 hour; this rests the gluten for easier rolling.

2-Second Step: Roll and cut the dough Roll chilled dough to 1/2-inch thickness on a floured surface. Use a 3-inch donut cutter for rings or two sizes for holes. Re-roll scraps once for 12-15 glazed donuts. For filled versions, use a smaller cutter. Vegan adaptation: Use plant-based flour if needed. Keep cut donuts covered to prevent drying.

3-Third Step: Heat oil and fry Pour 3-4 inches oil into a deep pot or fryer, heating to 350°F. Use a thermometer for accuracy. Fry 2-3 donuts at a time, 1-2 minutes per side until golden. Turn gently with tongs. Drain on paper towels. Work in batches to maintain oil temperature; cooler oil makes greasy sour cream donuts. Dietary note: Air-fry gluten-free versions at 375°F for 8 minutes, flipping halfway.

4-Fourth Step: Make the glaze Whisk 2 cups sifted powdered sugar, 1/4 cup milk, 1 tsp vanilla, and pinch of salt until smooth. Adjust with milk for dipping consistency. For tangier glaze, add 1 tbsp sour cream. Keep warm over simmering water.

5-Fifth Step: Glaze the donuts Dip warm donuts fully or halfway into glaze. Place on a wire rack over parchment to set for 10-15 minutes. Add sprinkles or zest while wet. Yields 12-15 sour cream glazed donuts.

6-Final Step: Finishing touches and serving Serve fresh with coffee. Total time: 2 hours. Store extras as noted later. These steps make the doughnut recipe foolproof for beginners or pros.