Preheat the air fryer to 400°F (204°C). If your air fryer doesn't have a preheat setting, turn to 400 degrees and wait about 5 minutes for it to come to temperature.
Meanwhile, cut the mushrooms in half and mince the garlic.
Add the mushrooms, oil of choice, salt, and garlic to a large bowl. If using the optional balsamic vinegar or coconut aminos, add that in as well. Mix well to coat the mushrooms with the oil and seasonings.
Once the air fryer is hot, pour the seasoned mushrooms into the air fryer basket in a single layer. Although the mushrooms may touch (they'll shrink a lot during cooking), be careful not to overcrowd the basket too much.
Close the air fryer and cook for 5 minutes, then stop to gently shake the basket or use a spatula to turn them. Air fry again for another 5-7 minutes, checking near the end of the cook time to make sure they aren’t overcooking.
Transfer the cooked mushrooms to a serving bowl or dish, garnish with green onions or parsley (if using), and serve!
Video
Notes
To store leftovers: Transfer any leftovers to an airtight container, or transfer to a bowl and cover tightly with plastic wrap. Store in the refrigerator for 3-4 days.To reheat leftovers in the air fryer: Preheat the air fryer to 400 degrees Fahrenheit, then add leftovers to the air fryer basket. Cook for 3-4 minutes or until heated through and beginning to crisp up again.
*Nutrition information does not include optional ingredients.