Peel the bananas and slice them into even, thin rounds—about ⅛ inch thick.

In a mixing bowl, gently toss the banana slices with melted coconut oil to coat them lightly on both sides.

In a small bowl, stir together the sugar and cinnamon.

Lay the banana slices in a single layer in the air fryer basket (avoid overlapping) and lightly sprinkle the cinnamon sugar mixture over the top.

Cook at 350°F (175°C) for 8–10 minutes, flipping the chips halfway through and watching closely toward the end to prevent burning.

Let the chips cool on a wire rack or plate—they’ll crisp up more as they cool.

Serve immediately or store for later snacking!