Preheat the air fryer: Set it to 375°F (190°C) for about 3 minutes so it’s hot and ready.
Prep the bananas: Peel 2–3 bananas.
Slice them in half lengthwise, or cut into thick coins (about 1/2 inch). Halves stay a little firmer; coins get extra caramelized.
Make the quick glaze: In a small bowl, mix 1 tablespoon melted butter (or coconut oil), 1 to 1.5 tablespoons brown sugar, 1/2 teaspoon cinnamon, 1/2 teaspoon vanilla, and a pinch of salt.
Coat the bananas: Gently toss or brush the bananas with the glaze so each piece gets a light, even coating. Don’t soak them—just enough to shine.
Prepare the basket: Line the air fryer basket with a small piece of parchment or a silicone liner to prevent sticking.
Leave room around the edges for airflow.
Air fry: Arrange bananas in a single layer. Cook for 5–7 minutes, flipping once halfway through. They’re done when the edges are caramelized and the centers are tender but not falling apart.
Add toppings (optional): While hot, sprinkle on chocolate chips so they melt slightly, or add chopped nuts for crunch.
A little flaky sea salt is great if you like sweet-salty.
Serve: Spoon over vanilla ice cream for a classic sundae, or serve with Greek yogurt for a lighter option. Drizzle any caramel from the liner over the top.