Prep: Preheat air fryer to 390°F or 200°C for 5 minutes. In a small bowl, combine cinnamon and sugar. Add mulling spices syrup to a separate bowl.

Shape: Open biscuit can and cut center holes using a biscuit cutter or bottle. Shape holes into balls and form remaining dough into donut shapes.

Coat: Working one at a time, sprinkle cinnamon sugar mixture over each raw donut to coat completely. Set aside.

Cook: Reduce temperature to 350°F / 177°C. Air fry donuts in batches for 10 minutes, leaving space between each for proper air circulation.

Finish: Dip warm donuts in mulling spices syrup, then coat again in cinnamon sugar mixture.

Serve: Enjoy while warm!

Note: For extra large air fryers, cooking time may need to be increased by 2-3 minutes.