Separate biscuit dough. Using a small cookie cutter (or a soda lid), cut out the centers of each biscuit round. Either set these mini circles aside to make mini donut holes or combine the dough to shape one more full-sized donut.
Place two to three biscuit rounds into your air fryer, making sure they have at least 1 inch on each side to expand.
Set the air fryer to 350°F and leave the donuts in for about 7 minutes or until golden brown. To make the donut holes, set the air fryer to 325°F and leave them in for about 5 minutes or until golden brown.
Once the donuts have cooled, melt the butter in the microwave and place in a shallow dish.
Grab another shallow dish and combine the brown sugar and cinnamon. Place the powdered sugar in a third shallow dish.
Place the bowls in the following order on the counter: butter, cinnamon sugar mixture, powdered sugar.
To assemble the donuts, thoroughly dunk each donut in butter followed by another dunking in either the cinnamon sugar or the powdered sugar (or both!). Make sure the donuts are fully coated.
Place on a baking sheet and let donuts sit for about 2 or 3 minutes before enjoying.
Serving Size 1 donut