01 - Preheat the air fryer to 350°F (180°C) for 3 minutes.
02 - Peel the bananas and slice them into 1/8-inch rounds using a sharp knife or mandoline.
03 - Gently toss the banana slices in a medium bowl with the melted coconut oil until evenly coated.
04 - In a separate bowl, combine the granulated sugar, ground cinnamon, and a pinch of salt.
05 - Sprinkle half of the cinnamon sugar mixture over the banana slices and toss to distribute evenly.
06 - Place the banana slices in a single layer in the air fryer basket, ensuring there is no overlap. Work in batches if necessary.
07 - Air fry the banana slices for 12–15 minutes, turning them halfway through, until crisp and golden. Watch them closely to avoid burning.
08 - Immediately after removing from the air fryer, toss the warm banana chips with the remaining cinnamon sugar mixture.
09 - Let the banana chips cool completely on a wire rack or paper towel to achieve full crispiness before serving.