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You are here: Home / Air Fryer Recipes / Air Fryer Mushrooms and Onions

Air Fryer Mushrooms and Onions

May 27, 2025 Updated: May 27, 2025 By Leanne 8 Comments

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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 simple yet flavorful, and go perfectly with steak, pork and chicken, or as a topping for burgers (like these air fryer turkey burgers)!

If you love sautéed mushrooms and onions, you’ll love this version prepared in the air fryer. You get similar results without the hands on work of cooking them on the stove top. Just stir them once while they’re cooking, and the air fryer does the rest!

Mushrooms and onions served in a bowl with a spoon.

Table of contents

  • Ingredients and substitutions
  • How to air fry mushrooms and onions
  • Key recipe tips
  • Recipe FAQs
  • More air fryer side dishes

This recipe was originally published in January 2021 and was tested in a smaller capacity (2.75 quart) air fryer. Currently, my preferred air fryer is a larger capacity 5.8 quart, so I decided to update the recipe to reflect this. The revised version also includes new photos, a few minor additions to the recipe and more helpful tips for readers.

For more air fryer side dishes, check out this collection of 15+ quick and easy air fryer sides!

Ingredients and substitutions

Below is a brief overview of the ingredients and recommended substitutions. The recipe card at the end of this post includes the exact quantities used.

Ingredients to make air fried mushrooms and onions arranged individually.
  • Fresh mushrooms – I normally use cremini mushrooms (baby bellas) 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

Below is a brief overview of the steps to make this recipe along with photos. For further details, please see the recipe card at the end of this post.

Chopped mushrooms and sliced onions on a wooden cutting board with a knife.
Step 1: Clean the mushrooms and slice them in half. Cut the onions lengthwise in 1/4 inch slices.
Sliced onions and chopped mushrooms in a bowl and tossed together with seasonings.
Step 2: Add the mushrooms and onions to a large bowl and toss with oil, Worcestershire sauce, garlic powder, salt and pepper.
Seasoned mushrooms and onions in the air fryer basket.
Step 3: Place the seasoned mushrooms and onions in the air fryer basket. They will be overlapping and that’s okay.
Cooked mushrooms and onions in the air fryer basket.
Step 4: Air fry on 400F for 11-13 minutes, stirring them at the mid-way point.

Key recipe tips

  • 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 1/4-inch slices so they cook at the same rate as the mushrooms.
Close up of cooked mushrooms and onions.

Recipe FAQs

What’s the best way to clean mushrooms for this recipe?

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.

How do you know when the mushrooms and onions are cooked?

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.

What’s the best way to reheat mushrooms and onions?

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.

More air fryer side dishes

  • Air Fryer Peppers and Onions
  • Air Fryer Parmesan Potatoes
  • Air Fryer Snap Peas

If you make this recipe, I’d love to hear what you think in the comments below!

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Air fryer mushrooms and onions served in a white bowl with a serving spoon inserted into it.

Air Fryer Mushrooms and Onions

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 2 reviews
  • Author: Leanne
  • Prep Time: 5 minutes
  • Cook Time: 13 minutes
  • Total Time: 18 minutes
  • Yield: 4 servings
  • Category: Side Dish
  • Method: Air Fry
  • Cuisine: Canadian, American
  • Diet: Vegetarian
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Description

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 make a delicious side dish for steak, pork and chicken, or as a topping for burgers!


Ingredients

  • 1/2 pound (227g) cremini mushrooms, halved (or quartered, if large)
  • 1 large yellow onion, cut lengthwise into 1/4 inch slices
  • 2 tablespoons olive oil
  • 2 teaspoons Worcestershire sauce
  • 1/2 teaspoon fine sea salt salt
  • 1/4 teaspoon ground black pepper
  • 1/4 teaspoon garlic powder


Instructions

  1. Place all of the ingredients in a large bowl and toss together until the mushrooms and onions are well coated.
  2. 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

  1. As the mushrooms shrink, I usually cut them in half instead of into thin slices. If your mushrooms are large, you may want to quarter them.
  2. The onions are cut into 1/4 inch slices so they cook at the same rate as the mushrooms. Thicker slices will be too firm when the mushrooms are ready.
  3. The onions won’t soften as much as sautéed onions and will still have a little bite.
  4. I used a 5.8 quart air fryer to make this recipe. 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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Filed Under: Air Fryer Recipes, All Recipes, Side Dishes

Previous Post: « Air Fryer Peppers and Onions
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Reader Interactions

Comments

  1. Paulie says

    August 23, 2022 at 1:32 pm

    Try adding a splash of Worchestershire, maybe a teaspoon. Makes them taste like steakhouse mushrooms 😋

    Reply
    • Leanne says

      August 26, 2022 at 11:51 am

      Sounds delicious. Thanks for the tip!

      Reply
  2. PammYW says

    May 6, 2022 at 12:18 am

    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!

    Reply
    • Leanne says

      May 6, 2022 at 7:19 pm

      I hope you enjoy the recipe!

      Reply
  3. Katherine | Love In My Oven says

    January 15, 2021 at 5:14 pm

    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!

    Reply
    • Leanne says

      January 18, 2021 at 7:49 pm

      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!

      Reply
  4. Terry says

    January 14, 2021 at 11:12 am

    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!

    Reply
    • Leanne says

      January 14, 2021 at 10:20 pm

      Thanks Terry! They’re so good on pizza. Definitely worth a try!

      Reply

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Meet Leanne

Hey there! I'm Leanne and welcome to Crumb Top Baking. I'm a self-taught baker, home cook and food photographer, and I'm passionate about sharing well-tested, simple and approachable desserts and savory recipes. Learn more about me and what you'll find on Crumb Top Baking....

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