01 - Preheat the air fryer to 350°F (180°C) for 3 minutes.
02 - Peel bananas and cut them into 1/8-inch-thick rounds using a sharp knife or mandoline.
03 - In a medium mixing bowl, gently toss the banana slices with melted coconut oil to ensure all surfaces are coated.
04 - In a separate small bowl, combine granulated sugar, ground cinnamon, and a pinch of salt.
05 - Sprinkle half of the cinnamon sugar mixture over the oiled banana slices and toss gently to distribute.
06 - Place banana slices in a single, non-overlapping layer in the air fryer basket. Work in batches if necessary.
07 - Cook for 12 to 15 minutes, flipping slices halfway through with tongs, until golden and crisp. Monitor closely during the final minutes to prevent over-browning.
08 - Immediately toss hot banana chips with the remaining cinnamon sugar mixture for a uniform coating.
09 - Let banana chips cool completely on a wire rack or plate to maximize crispiness before serving.