Sautéed Mushrooms and Onions

Name: Sautéed Mushrooms and Onions
Prep time: 5 min
Cook time: 10 min
Total time: 15 min
Ingredients: 2 tablespoons olive oil; 1 onion (sliced into half-moons); 4 cups (300g) mushrooms (cleaned and sliced, Note 1); ½ teaspoon salt; ¼ teaspoon ground black pepper; 1 tablespoon butter; 3 cloves garlic (finely minced or crushed); 1 tablespoon soy sauce; 3 tablespoons dry white wine (optional, sub with vegetable stock or water); 1 tablespoon fresh thyme (chopped)

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By: Diana Posted: 8/15/21 Updated: 11/20/21

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These Sauteed Mushrooms and Onions are the perfect side and topping for your steaks, chicken, burgers, omelets, or mashed potatoes. It’s also a great filling for quesadillas, tacos, sandwiches, and many more. Ready in just 15 minutes!

Sauteeing mushrooms and onions sound like a straightforward recipe, and it really is, but I have a few tips to share with you to make this side restaurant-worthy. It will take your food to the next level, and you’re going to love it!

I often make this to serve over grilled steak, or air fried steak with a simple side salad and creamy mashed potatoes. And honestly, this meal tastes as good as something I order at a fancy restaurant.

If you love mushrooms as much as I do, try my mushroom tart, this simple mushroom rice, easy mushroom tacos, and this Indian mushroom bhaji appetizer.

Ingredients Used

Here’s what you’ll need to make flavorful sauteed mushrooms and onions:

Mushrooms. Any kind of mushrooms can be used here. I normally use white mushrooms or cremini mushrooms (baby bella), you can also use portobello mushrooms that are chopped into pieces. Clean and slice the mushrooms.
Onion. A large yellow onion that is sliced and caramelized along with the mushrooms. Thinly slice the onion.
Garlic. An essential ingredient that gives your side SO much flavor. Finely mince or crush the garlic.
Olive Oil and Butter. We’re using a combo of olive oil and butter, the butter is what gives this recipe a rich flavor, and the olive oil adds flavor as well and great for sauteeing the onions.
White wine. An optional ingredient that adds a tangy lovely flavor. Sub with vegetable broth or water if necessary.
Soy sauce, salt, and pepper. To season the mushrooms.
Thyme. I like to add fresh thyme for flavor, but it can be substituted with fresh rosemary.

Complete list of ingredients and amounts can be found in the recipe card below.

How To saute mushrooms and onions

In a large skillet or a saute pan, heat the olive oil over medium high heat.
Add the onions, and saute for 2 minutes stirring often.
Add the sliced mushrooms, season with salt and pepper and cook for 3 more minutes. The salt will help the mushrooms release their liquid, and make sure it’s stirred frequently.
When most of the liquid is cooked out and the mushrooms are tender, reduce the heat to low then melt the butter, add the garlic, and cook for 30 seconds.
Season with soy sauce, and add a splash of white wine to deglaze the pan scrubbing any bits stuck to the bottom of the pan with a wooden spoon.
Add chopped fresh thyme, cook for 30 seconds then remove from heat.

Top Tips

Clean the mushrooms by giving them a very quick rinse, you don’t want to soak them in water as they will end up absorbing lots of liquid and ruin their texture. Use a paper towel to dry them.
Don’t overcook the garlic. The garlic needs to be cook for just 30 seconds, cooking it for longer will change the flavor quite a lot.
Adjust seasonings to your preference. This side is properly seasoned with soy sauce, salt, pepper, and white wine. The soy sauce gives the mushrooms a savory flavor and a deep color, you can substitute the soy with worcestershire sauce for a gluteeen free option (double check that it’s gluten free though, most are, but some brands aren’t).

How to Serve Sauteed Onions and mushrooms

These delicious mushrooms and onions pair very well with pretty much anything, I’m not kidding. They’re SO good that you’ll want to add them to everything you make. They’re vegan, flavorful, and add a great texture to your food. Here are a few suggestions on what you can pair them with:

Steak. Nothing beats a properly cooked steak with a side of this mushroom and onion saute, it’s one of the best combos ever!
Pasta. Serve this with or in different pastas, it’s great with my garlic butter pasta, creamy lemon pasta, and garlic shrimp pasta.
Burgers. I love adding sauteed mushrooms to my burgers, it’s one of the best toppings!
Pizza. This is a brilliant topping for pizza, I have the best pizza dough recipe that you might want to check out.
Mashed Potatoes. If you’re having a simple vegetarian dinner of mashed potatoes with a simple salad, these mushrooms fit perfectly! In fact, I always make this for dinner for myself and love it.
Omelets. Spoon it over or in an omelet.
Sandwiches. Love grilled cheese sandwiches? Add these mushrooms to your sandwich to make it richer!
Twice Baked Potatoes or Baked Potatoes. You know that creamy potatoes and mushrooms are a match made in heaven.
Poutine. You will LOVE the crispy french fries, topped with homemade gravy, cheese curds, and these delicious sauteed onions and mushrooms!

Save this recipe for the next time you have mushrooms to use up or just want an easy delicious side dish. Pin it for more people to enjoy too!

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