Prepare the Biscuit Dough:

Open the can of biscuit dough and separate the biscuits. Use a small round cutter to cut out the center of each biscuit to create donut shapes. Save the centers to make donut holes!

Preheat the Air Fryer:

Preheat your air fryer to 350°F (175°C) for 3–5 minutes.

Air Fry the Donuts:

Lightly spray the air fryer basket with non-stick cooking spray. Place the donuts and donut holes in a single layer, leaving space between them for even cooking.

Cook at 350°F (175°C) for 5–6 minutes, flipping halfway through, until golden brown.

Coat the Donuts:

While the donuts are still warm, brush them with melted butter. Mix the sugar and cinnamon in a bowl, then coat the donuts in the mixture.

Make the Glaze (Optional):

In a small bowl, whisk together the powdered sugar, milk, and vanilla extract until smooth. Dip the cooled donuts into the glaze and let it set for a few minutes.

Serve:

Serve the donuts warm and enjoy their light, fluffy goodness!