Add the balsamic vinegar, oil, black pepper, Italian seasoning, and garlic powder to a small bowl. Mix until combined.
Wash and clean the mushrooms. Pat them dry with a paper towel. Then, place them on a plate.
Cover the mushrooms on both sides with the seasonings.
Preheat your air fryer to 380F (190C). Once it is hot, place the mushrooms in the air fryer basket (with the cap side facing down).Don’t overcrowd the basket and if needed- cook them in two separate batches.
Air fry the mushrooms for 7 minutes. If the mushrooms are big- up to 10 minutes may be neded. Remember to turn them over halfway through.
Remove the portobello mushrooms and let them cool for 10 minutes before serving them.
Nutrition
Calories: 80kcal
Course: Appetizer, Side Dish
Cuisine: American
Keyword: air fryer portobello mushrooms, portobello mushroom air fryer