01 - Preheat air fryer to 350°F for 3 minutes.
02 - Peel bananas and slice evenly into 1/8-inch coins using a sharp knife or mandoline.
03 - In a medium bowl, gently coat banana slices with melted coconut oil.
04 - Combine granulated sugar, ground cinnamon, and a pinch of salt in a small bowl.
05 - Sprinkle half of the cinnamon sugar mixture over the banana slices, tossing gently to coat.
06 - Place banana slices in a single layer in the air fryer basket, ensuring no overlap; work in batches if needed.
07 - Air fry for 12 to 15 minutes, turning slices halfway through, until crisp and golden. Monitor closely, as timing may vary.
08 - While still warm, toss banana chips with the remaining cinnamon sugar mixture.
09 - Allow banana chips to cool completely before serving for optimal crunch.