Preheat your air fryer to 300°F (150°C) for about 5 minutes.

Peel the bananas and slice them into ⅛-inch thick rounds for even crisping.

In a small bowl, mix the granulated sugar and ground cinnamon until well combined.

Place the banana slices in a bowl and gently toss them with the melted coconut oil or butter so each slice is lightly coated.

Sprinkle the cinnamon-sugar mixture over the banana slices and toss gently to distribute evenly.

Arrange the slices in a single layer in the air fryer basket without overlapping.

Cook the Air Fryer Banana Chips for 15 minutes, flipping them halfway through the cooking time.

Monitor closely near the end of cooking to prevent burning.

Once golden brown and crisp, transfer the banana chips to a wire rack and allow them to cool completely. They will continue to crisp as they cool.