Step 1: Prepare Your Ingredients

1. Line a baking sheet with parchment paper.
2. In a shallow bowl, combine granulated sugar and ground cinnamon. Set aside.

Step 2: Prep the Biscuits

1. Open the can of biscuits and separate them onto the prepared baking sheet.
2. Use a 1-inch round cutter (or a bottle cap) to cut holes in the center of each biscuit. Save the cutouts to make donut holes.

Step 3: Preheat the Air Fryer

1. Lightly coat the air fryer basket with olive or coconut oil spray. Avoid nonstick sprays like Pam, which can damage the basket’s coating.

Step 4: Cook the Donuts

1. Place 3–4 donuts in a single layer in the air fryer basket, ensuring they don’t touch.
2. Set the air fryer to 350°F and cook for 5–6 minutes, flipping halfway through, until golden brown.
3. Transfer the cooked donuts to the baking sheet and repeat with the remaining dough.

Step 5: Cook the Donut Holes

1. Place the donut holes in the air fryer.
2. Cook for about 3 minutes total, flipping halfway through.

Step 6: Add the Toppings

1. While the donuts are still warm, brush both sides with melted butter.
2. Dip each donut into the cinnamon sugar mixture, coating both sides evenly.

Step 7: Serve and Enjoy

1. Serve the donuts warm for the best texture and flavor.
2. Pair them with coffee, tea, or hot cocoa for a cozy treat.