These Air Fryer Mushrooms and Onions require just 7 ingredients and are ready in less than 20 minutes, including prep time and cooking time! They're the perfect side for steak, pork and chicken. We especially love them as a topping for burgers like these jalapeno turkey burgers or stuffed into fajitas like these ground beef fajitas!
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Quick Look: Air Fryer Mushrooms and Onions
- ⏱ Prep Time: 5 minutes
- 👩🏻🍳 Air Frying Time: 13 minutes
- ⏳ Total Time: 18 minutes
- 🍽 Servings: 4
- ⚡ Calories: 94 per serving
- 🔥 Flavor/texture: caramelized, rich, savory and umami flavor; mushrooms are tender and onions still have a little bite.
- 👌 Difficulty: super easy, just 7 ingredients, almost hands off.
- ❤️ Why you'll love: no standing over a hot stove, easier clean up.
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Why this recipe works so well
If you love the taste of stovetop sautéed mushrooms and onions, you'll love this air fryer version! Here's why:
- Less oil needed. The circulating air mimics sautéing with just a little bit of oil and the mushrooms and onions won't get too soft like they sometimes do in a skillet.
- Incredible flavor. You get the same deep, savory, caramelized flavor as you would on the stovetop. (Not quite as deep or caramelized as you get for my dairy-free caramelized onion dip, but the rich flavor is still there)!
- Almost hands-off. Instead of babysitting a skillet on the stovetop, just stir the mushrooms and onions once, and the air fryer does the rest. (It's the same reason I love to cook peppers and onions in the air fryer too)!
- Faster cleanup. You only need to wash a non-stick air fryer basket instead of a heavy, crusted skillet.
Table of Contents
Ingredient notes and substitutions
- Fresh mushrooms - I normally use cremini mushrooms (baby bellas), as I do with my mushroom spinach dip, as I like the firm texture and earthy flavor. You can also use white or button mushrooms.
- Yellow onion - This is probably the most common type of onion. It has a strong flavor and it's great for caramelizing. If you prefer a milder onion, try using a white or sweet onion.
- Olive oil - Some recipes call for oil and butter but we're using all oil here. I prefer olive oil for the mild flavor, but avocado oil works too.
- Worcestershire sauce - Adding this was a reader recommendation and it adds a slight umami flavor.
- Seasonings - Just some salt, pepper and garlic powder. Feel free to also add some dried herbs like thyme or oregano.
How to air fry mushrooms and onions
Step 1: Clean the mushrooms and slice them in half. Cut the onions lengthwise in ¼ inch slices.
Step 2: Add the mushrooms and onions to a large bowl and toss with oil, Worcestershire sauce, garlic powder, salt and pepper.
Step 3: Place the seasoned mushrooms and onions in the air fryer basket. They will be overlapping and that's okay.
Step 4: Air fry on 400F for 11-13 minutes, stirring them at the mid-way point.
Expert tips for air frying mushrooms and onions
- Mushrooms: They will shrink quite a bit so I usually cut them in half instead of into thin slices. If your mushrooms are large, you may want to quarter them.
- Onions: The onions won't soften as much as sautéed onions and will still have a little bite. Cut them into ¼-inch slices so they cook at the same rate as the mushrooms.
- Air fryer capacity: I used a 5.8 quart air fryer. If you're using a smaller capacity air fryer, the basket will be full so you'll need to add about 5 minutes to the air frying time and shake the basket more than once to rotate the mushrooms and onions around.
Air fryer mushrooms and onions FAQs
You can clean mushrooms in two different ways. You can gently rub the dirt off each one with a paper towel. Or, you can rinse the mushrooms in a colander and pat them dry with a paper towel. I prefer to rub the dirt off as rinsing them may cause the mushrooms to absorb some water and affect how well they air fry.
The mushrooms should be browned and tender, but not too soft. They will also shrink in size. The onions will get translucent and start to caramelize around the edges. They should soften a bit but still have some bite. If you want them caramelized a bit more, air fry them for another few minutes. Just keep an eye on them as the mushrooms can start to dry out and the onions will burn.
The easiest way is to pop them in the microwave for 45-60 seconds, or until heated through. You can also reheat them in the air fryer on 350F for 3-5 minutes or in a skillet on the stove top.
Serving them with grilled steaks or pork chops is always delicious. You can also try them on the side with these air fryer pork medallions or air fryer chicken cutlets. If you have some left over and want to incorporate them into breakfast, I think serving them with some air fryer egg bites and bacon would work well. We also sometimes use them as a pizza topping for these air fryer mini pizzas or this healthier pizza recipe!
More air fryer side dishes
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If you make this recipe, please leave a review and rating below to let me know what you think. If you have a question, drop that below too!
📖 Recipe
Air Fryer Mushrooms and Onions
Ingredients
- ½ pound (227 g) cremini mushrooms, halved (or quartered, if large)
- 1 large yellow onion, cut lengthwise into ¼ inch slices
- 2 tablespoons olive oil
- 2 teaspoons Worcestershire sauce
- ½ teaspoon fine sea salt salt
- ¼ teaspoon ground black pepper
- ¼ teaspoon garlic powder
Instructions
- Place all of the ingredients in a large bowl and toss together until the mushrooms and onions are well coated.
- Transfer to the air fryer basket and air fry on 400F for 11-13 minutes, or until the mushrooms are browned and tender and the onions start to caramelize around the edges. (Stir the mushrooms and onions at the halfway point to ensure they cook evenly).
Notes
- Mushrooms: They will shrink quite a bit so I usually cut them in half instead of into thin slices. If your mushrooms are large, you may want to quarter them.
- Onions: The onions won't soften as much as sautéed onions and will still have a little bite. Cut them into ¼-inch slices so they cook at the same rate as the mushrooms.
- Air fryer capacity: I used a 5.8 quart air fryer. If you're using a smaller capacity air fryer, the basket will be full so you'll need to add about 5 minutes to the air frying time and shake the basket more than once to rotate the mushrooms and onions around.
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Nutrition Facts per Serving
Disclaimer
Nutrition information is an estimate only and will vary depending on the substitutions made and the brands used.
Did you make this recipe or have any questions?
I love reading your comments and addressing your questions, so please leave your comments and ratings or questions below!
Paulie says
Try adding a splash of Worchestershire, maybe a teaspoon. Makes them taste like steakhouse mushrooms 😋
Leanne says
Sounds delicious. Thanks for the tip!
PammYW says
I love mushrooms and tonight had a taste a mushroom and onions so looked up an air fry recipe. Think I'm about to give this one a try!
Leanne says
I hope you enjoy the recipe!
Katherine | Love In My Oven says
I love mushrooms and onions, Leanne. I've been eating a ton of them lately! My kiddos would probably not touch this but that just means more for me 😉 I need to try them in the air fryer!
Leanne says
Haha thanks Katherine! I don't think I was a fan of mushrooms and onions when I was a kid either. But you're right, just means more for you!
Terry says
Great idea. I’ve never though of doing mushrooms and onions in the air fryer but it would be so much easier! Definitely will have to try this. I usually just have this with steak or burgers but I really like the idea of putting it on pizza too!
Leanne says
Thanks Terry! They're so good on pizza. Definitely worth a try!