If needed per your model of Air Fryer, preheat to 375 degrees F.
Wash the Brussels Sprouts, remove any thick woody base (leaving enough to keep the sprouts intact when cut in half), and then cut the Brussels sprouts in half.
If desiring softer Brussels Sprouts (recommended): Place the trimmed Brussels sprouts in a large microwave-safe bowl with ½ cup of water. Microwave for 3 minutes.
Drain the Brussels sprouts and pat dry with a paper towel. Dry out the bowl and return the Brussels sprouts to the bowl. Toss with oil, salt, and pepper.
Spread out the seasoned Brussels Sprouts evenly in the air fryer in a single layer. Air fry at 375 degrees F for 5 minutes, remove the basket, flip or shake the Brussels sprouts and return to the air fryer and cook for another 5 minutes. Shake again and continue to air fry in 2-minute intervals until you reach your desired consistency.
Serve as desired.
Oil: Use olive, avocado, or canola oil. To keep this recipe lower in fat, use cooking spray. Storage: Store leftovers in an airtight container for up to 4 days in the refrigerator. Reheat by air frying for 3-4 minutes at 375 degrees.