In a large bowl, combine the halved Brussels sprouts, olive oil, minced garlic, salt, black pepper, and red pepper flakes (if using). Toss until the Brussels sprouts are well coated.
Add the grated Parmesan cheese to the mixture and toss again until the cheese is evenly distributed.
Place the seasoned Brussels sprouts in the air fryer basket in a single layer for even cooking. You may need to do this in batches depending on the size of your air fryer.
Air fry the Brussels sprouts for 12-15 minutes, shaking the basket halfway through to ensure they cook evenly and achieve a golden-brown color.
Once cooked, remove the Brussels sprouts from the air fryer and garnish with fresh chopped parsley before serving.
Notes
For extra flavor, feel free to add more garlic or adjust the red pepper flakes to your taste.
Keyword air fryer, Brussels sprouts, garlic, Parmesan