Step 1

Preheat oven to 375 degrees.

Step 2

In a medium mixing bowl, combine the flour, sugar, cocoa powder, chocolate chips, baking soda, and salt.

Step 3

In a small bowl, beat together the vanilla, egg, sour cream, milk, and oil.

Step 4

Stir the wet ingredients into the dry until just combined.

Step 5

Spoon in a greased donut pan.

Step 6

Bake for 8 minutes or until the tops spring back when you touch them.

Step 7

Let the donuts cool in the pan before glazing.

Step 8

Whisk together the powdered sugar, milk, and vanilla until smooth.

Step 9

Dunk the donuts in the glaze to fully coat and place on a wire rack to set, about 5 minutes.