Open your can of biscuits and separate the biscuits onto a stable, clean surface such as a cutting board.
1 can Refrigerated Biscuits
Use a sharp knife, donut cutter, or bottle cap to cut a hole in the center of each biscuit dough round. Remove the donut holes from the center of the biscuits, then reserve them to make air fried donut holes later.
Spray your air fryer basket with oil spray. Do not use cooking spray with additives, as this can damage the non-stick coating of your air fryer. We recommend using a neutral oil to avoid adding unwanted flavor.
Oil Spray
Place the biscuit donuts into the air fryer basket in a single layer. They should not touch each other. IMPORTANT: If you have an air fryer toaster oven model with a tray, see the notes below!
Air fry at 350°F for 5 minutes, or until lightly browned. Carefully turn each biscuit donut over, then air fry 1 more minute.
Remove the biscuit donuts from the air fryer carefully, using a spatula. Place them on a cooling rack.
Let them rest until they're cool enough to handle (2-3 minutes or so). Don't let the donuts sit too long, or the cinnamon sugar won't stick to the donuts.
While the donuts are cooling, melt butter in a microwave-safe bowl and set it aside.
5 Tablespoons unsalted butter
Combine sugar with ground cinnamon in a separate bowl.
½ cup granulated sugar, 1 Tablespoon ground cinnamon
When the donuts are cool enough to handle, use a pastry brush to coat each one in butter on both sides. Then, dip the donuts into the cinnamon sugar mixture to coat them evenly.
Serve, and enjoy!