Thin slices: Cut firm bananas into thin, even rounds.
Light coat: Toss the slices with a teaspoon of melted coconut oil and a dusting of cinnamon.
Air-fry or bake: Cook at 300°F (150°C) for 10 to 12 minutes, flipping halfway through until golden.
Cooling: Allow them to cool completely on a rack to achieve maximum crispiness before bagging them.