These Oreo donuts are the best ever!! They are made with black cocoa powder (which is an ingredient used in real Oreo cookies) AND they have crushed Oreos in the donut batter!
Preheat oven to 350°F. Spray a donut pan with nonstick cooking spray that contains flour.
In a medium bowl, whisk the flour, black cocoa powder, Oreo crumbs, baking soda, baking powder, salt. Set aside.
In a stand mixer fitted with paddle mix the egg, egg yolk, vanilla, brown sugar, sour cream, and melted butter until smooth and combined.
Add the dry ingredients to the wet ingredients and mix until just combined. Batter will be very thick.
Spoon batter into a Ziplock bag or piping bag that has the corner snipped off.
Pipe the batter into the donut pan, the cavities should be ½ full. (The donuts will rise a lot).
Bake for 7-8 mins or until a toothpick comes out with a few moist crumbs. Remove from oven. Let cool in pan for 3-5 mins then turn out on a wire rack and let the donuts cool completely before frosting.
Frosting/Glaze
Combine frosting ingredients in a bowl, minus the Oreo crumbs. Whisk until smooth. Should be thick able to drizzle down off the whisk. Either dip the tops of donuts in frosting or spoon and drizzle the frosting overtop of each donut. The donuts are quite tender and delicate so drizzling might be the best option but you can experiment and do what’s best for you!
Last but not least, sprinkle Oreo crumbs overtop of the frosting/glaze.