Begin the process by preheating your air fryer to 375°F (190°C), allowing it to heat for approximately 5 minutes to ensure even cooking.
While the air fryer warms up, gently clean each mushroom with a damp paper towel to eliminate any dirt or debris. Carefully remove the stems from the caps and set them aside for later use.
In a medium-sized mixing bowl, finely chop the reserved mushroom stems and add them to the bowl along with the softened cream cheese, grated Parmesan cheese, Italian breadcrumbs, chopped parsley, minced garlic, oregano, red pepper flakes (if using), and a pinch of salt and pepper. Mix everything together thoroughly until the mixture is well combined and creamy.
With a generous hand, stuff each mushroom cap with the creamy mixture, pressing down slightly to ensure a packed filling that holds well during cooking.
Lightly coat the air fryer basket with olive oil spray to prevent the mushrooms from sticking during the cooking process.
Arrange the stuffed mushrooms in a single layer within the air fryer basket, making sure not to overcrowd them for even cooking.
Air fry the mushrooms for 10-12 minutes, or until the tops are beautifully golden brown and the mushrooms are tender. Keep an eye on them to avoid overcooking.
Once cooked, use tongs to carefully remove the stuffed mushrooms from the air fryer. Allow them to cool for about a minute before plating.
Notes
For an inviting presentation, arrange the stuffed mushrooms on a colorful serving platter and garnish with additional parsley.