Prep: Remove the tough ends of the Brussels sprouts and remove any damaged outer leaves. Rinse under cold water and pat dry. If your sprouts are on the large side, cut them in half. Toss in oil, salt, and pepper.
Cook: Arrange Brussels sprouts in a single layer in your air fryer, working in batches if they don't all fit. Cook at 375°F (190°C) for 8 to 12 minutes, shaking the pan halfway through cooking to evenly brown them. They are done when lightly browned and crispy on the edges.
Serve: Serve sprouts warm, optionally topped with balsamic reduction and parmesan.
Variations on this recipe:
Garlic: About halfway through cooking, toss the sprouts with a few cloves of minced garlic.
Balsamic: Drizzle on balsamic reduction just before serving.
Parmesan: Sprinkle over the cooked sprouts.
No Oil: You can air fry these Brussels sprouts with no or less oil (though I do recommend using some oil for the flavor). To use less oil, spray the sprouts with oil to evenly coat while using less. To use no oil, simply omit it from the recipe.
Frozen: To air fry frozen Brussels sprouts, space the sprouts out more in the air fryer to allow excess moisture to evaporate, then add 3 to 5 minutes to the cooking time.