Peel and slice the ripe bananas into pieces that are ¾-inch thick. It is best to keep each piece about the same size, so they cook evenly.
2 medium-to-large bananas
In a small bowl, add the ground cinnamon. Using your fingers, coat each banana slice in cinnamon. Apply a thin coating, tapping each piece to remove any excess cinnamon.
2 medium-to-large bananas, 1 tablespoon ground cinnamon
Preheat the air fryer to 380º Fahrenheit. When it is done preheating, use tongs to add the banana pieces to the basket. Keep the pieces separated.
Air fry for 9 minutes. Use tongs to gently remove the slices.
Enjoy immediately!
