01 - Preheat the air fryer to 350°F (180°C) for 3 minutes.
02 - Peel the bananas and slice into 1/8-inch thick rounds using a sharp knife or mandoline.
03 - In a medium mixing bowl, gently toss banana slices with melted coconut oil to coat evenly.
04 - Mix together the granulated sugar, ground cinnamon, and salt in a small bowl.
05 - Sprinkle half the cinnamon sugar mixture over the banana slices and toss until coated.
06 - Place banana slices in a single layer in the air fryer basket, ensuring slices do not overlap. Work in batches if needed.
07 - Air fry for 12 to 15 minutes, flipping the banana slices halfway through, until golden and crisp. Monitor closely to avoid over-browning.
08 - Immediately while the chips are warm, toss with the remaining cinnamon sugar mixture.
09 - Allow banana chips to cool completely for optimal crispiness before serving.