Prepare the Bananas: Peel and slice the bananas into thin, uniform rounds (about ⅛-inch thick) for even cooking.

Coat the Bananas: In a small bowl, mix the coconut oil (or melted butter) with the granulated sugar and ground cinnamon until well combined.

Toss the Bananas: Gently toss the banana slices in the cinnamon-sugar mixture, ensuring each slice is evenly coated.

Air Fry the Banana Chips: Preheat your air fryer to 350°F (175°C). Arrange the banana slices in a single layer in the air fryer basket. If needed, cook in batches to avoid overcrowding. Air fry for 10-12 minutes, flipping halfway through, until the chips are golden brown and crispy. Keep an eye on them to prevent burning.

Cool and Serve: Once done, remove the banana chips from the air fryer and let them cool on a wire rack. They will crisp up more as they cool.

Enjoy: Serve the banana chips immediately, or store them in an airtight container for later.