Peel the bananas and slice them into thin, even rounds about 1/8 inch thick for best crispiness

Place the slices in a mixing bowl and gently coat them with melted coconut oil or butter

In a separate bowl, mix sugar, cinnamon, and salt

Sprinkle the cinnamon-sugar mixture over the banana slices and toss until evenly coated

Preheat the air fryer to 350°F (175°C) for a few minutes

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

Air fry for 8–10 minutes, flipping halfway through to ensure even cooking

Keep an eye on them during the last few minutes to prevent burning

Remove from the air fryer and let them cool for 5–10 minutes to crisp up further

Serve immediately or store for later