Preheat the air fryer. Set it to 375°F (190°C) for 3–5 minutes. A hot basket helps the bananas caramelize quickly.

Prep the bananas. Peel and slice into 1/2-inch rounds or cut lengthwise into halves if you prefer larger pieces. Keep the slices uniform so they cook evenly.

Mix the coating. In a small bowl, stir together brown sugar, melted butter or coconut oil, cinnamon, vanilla, and a pinch of salt. The mixture should be glossy and spreadable.

Coat the bananas. Gently toss or brush the bananas with the mixture. Don’t overmix—just enough to cover the surfaces without breaking the slices.

Prep the basket. Lightly spray the air fryer basket or place a perforated parchment liner. This prevents sticking and helps with cleanup.

Arrange the bananas. Place in a single layer with some space between pieces. Crowding leads to steaming instead of caramelizing.

Air fry. Cook for 5–7 minutes, flipping halfway. You’re aiming for caramelized edges and a soft, tender center. Thicker pieces may need another 1–2 minutes.

Finish and serve. Let them sit for 1 minute—the sugar is hot. Top with nuts, a drizzle of honey, or a scoop of vanilla ice cream. Serve warm for the best texture.