01 -
Set your oven for 350°F (175°C). Grease two mini muffin pans (24-cup each) or three to four donut hole pans lightly.
02 -
Mix the cocoa, flour, salt, baking soda, and baking powder in a big mixing bowl until it’s all well blended.
03 -
In a separate bowl, beat the sugars with melted butter until smooth and creamy. Then stir in the yolk, eggs, and vanilla.
04 -
Stir the milk and sour cream in a small pitcher until smooth. Add dry mixture, then milk, and repeat—start and finish with the dry ingredients. Mix softly by hand till the flour disappears.
05 -
Spoon or scoop the batter into the pans, filling each about 3/4 of the way.
06 -
Pop them in the oven for around 10 minutes. They’re done when a toothpick poked in the center comes out clean. Cool the pans for a few minutes, then transfer the donuts to a rack to finish cooling.
07 -
In a mid-size bowl, whisk powdered sugar, milk (about 3 tablespoons), and vanilla till it’s smooth. If it’s thick, add a bit more milk till it’s pourable.
08 -
After cooling, dip the donut holes into the glaze and let any extra drip off. Set them back on the rack to dry. Want them thicker? Thin the glaze slightly, then re-dip 1–2 more times.
09 -
Wait for the glaze to dry before eating. Dig into your chocolaty donut treats!