01 - Peel the bananas and cut them into thin, even slices approximately 1/8 inch thick for consistent cooking.
02 - Combine granulated sugar and ground cinnamon in a small bowl until thoroughly blended.
03 - Brush both sides of banana slices lightly with melted coconut oil, then sprinkle the cinnamon sugar mixture evenly over each side.
04 - Place coated slices in a single layer in the air fryer basket, working in batches as needed to prevent overlapping.
05 - Cook at 350°F for 10-15 minutes, flipping chips halfway through. Monitor closely during final minutes to prevent burning.
06 - Transfer chips to a wire rack to cool completely. Chips will achieve maximum crispiness as they cool. Optional: sprinkle with sea salt before serving.