In a large bowl, add the Brussels sprouts and olive oil. Sprinkle in the salt, pepper, and garlic. Toss to coat.
Preheat the air fryer to 385℉ and spray the air fryer basket with non-stick cooking spray.
Add the Brussels sprouts to the air fryer basket and cook for 10 minutes. After 5 minutes, shake the Brussels sprouts around in the basket to ensure even cooking and cook for the remaining 5 minutes. If you like your Brussels sprouts crispier, cook for an additional 2-4 minutes.
Remove from the air fryer and serve immediately with optional toppings, if desired.
Notes
Store any leftover Air Fryer Brussels Sprouts in an airtight container in the refrigerator for up to 3 days. To reheat, simply place them back in the air fryer at 400℉ for 3-5 minutes until heated through.