Preheat air fryer to 400ºF.
Prepare Brussels sprouts by trimming ends and removing outer leaves, then, cut them in half.
Transfer them into a bowl, then add olive oil, garlic powder, salt and pepper, and toss to combine.
Line the air fryer basket with parchment paper to keep it clean.
Place the seasoned Brussel sprouts on top of the parchment paper, and cook for 6 minutes.
Return the cooked Brussel sprouts to a bowl and sprinkle them with panko crumbs and parmesan cheese.
Transfer them back to the air fryer, arranging them in a single layer.
Air fry for an additional 5 to 7 minutes, until crisp-tender.
Servings 4