How To Saute Mushrooms and Onions

Learn how to saute mushrooms and onions that will compliment a burger, chicken or steak.

I can tell you one of my favorite things to put this sauteed goodness on is a good quality burger. It adds some incredible flavor and depth to a burger. They go great with all kinds of dishes like chicken, beef and pork. One of the benefits is how healthy they are for you.

When you saute mushrooms and onions you are bringing out the flavor when browning them. Don’t get this confused with caramelizing we are not going to break down the sugars of the vegetables to that extent.

onions and mushrooms sauted in a pan

Video – Sauted mushrooms and onions


  • 1 white onion
  • 1 pkg mushrooms
  • 1 tbsp olive oil
  • 1 tsp salt
  • 1 tsp fresh ground pepper
  • 3 tbsp chicken stock


  • frying pan
  • cutting board
  • chef knife
  • spatula

6 simple steps on how to saute mushrooms and onions

Follow these steps to get the best results. You do not want to end up with a soggy result.

Prepare the mushroom and onions

cleaning dirt off mushrooms

If the mushrooms have a ton of dirt on them go ahead and wipe as much off as possible. Do not wash the mushrooms, they are like sponges and will get soggy. Use a paper towel or a dishrag.

Sometimes I pull the stems out what I call the stumps but this is completely optional. You can eat the stems with no problems.

Slice up your onions and mushrooms to the thickness you want. I typically shoot for 1/8″ – 1/4″ for both. I created a post on how to peel onions that might help.

Some people do not like it if the onions get too stringy so they chop them up instead of slicing.

Heat the pan with oil

heating avocado oil in pan

Get yourself a frying pan and start it off with medium heat and a good quality oil.

You’re looking for enough oil to barely coat the bottom of the pan. I choose to use a good quality olive oil. Typically I use avocado oil because it has a high smoke point so you don’t risk the chance of burning the oil.

Keep an eye on the oil for it to be ready. You are looking for legs on the oil typically like you see in wine in a glass. I sometimes will flick a bit of water on the pan to tell its ready.

Saute in the pan

Go ahead and add the mushrooms and onions to the pan and start spreading them around. You want them all to have some surface contact with the bottom of the pan so they will brown up.

If your pan is too small you will overcrowd the mushrooms and onions and you will end up steaming them instead. So make sure you have some room for them to be able to have the water in them come out and evaporate. The worse thing you can do is add a cover to the pan! That will lock in the moisture and we want to get it out.

Season with salt and pepper

Season the mushrooms and onions with the salt and pepper. Season them from above so you are able to get an even coat over all of it. When you do it to close you tend to over season some of the mushrooms and onions and some get no seasoning.

Now go ahead flip them to get some caramelization on the other side as well.

Deglaze the pan

deglazing in frying pan

Now that you have browned the mushrooms and onions you want to incorporate all that flavor that now is stuck at the bottom of the pan. There are so many things you can use to deglaze the pan.

In this recipe I chose to use a chicken stock that I have made myself. Wine, balsamic vinegar and just plain old water are also popular.


close-up of the mushrooms and onions

The mushrooms and onions do not stay hot for long. They will keep for a while as you prepare what you’re going to put them on.

You can also reheat them really quickly if you need them hot. Simply toss them in a hot pan for a few minutes.


Should I wash the mushrooms?

No, if you wash your mushrooms they are going to absorb the water. To clean the mushrooms all you need to do is wipe off the excessive dirt.

Sauteing vs Caramelizing mushrooms and onions

So, we are talking about sauteing and not caramelizing the mushrooms and onions. Caramelizing is a different process that tends to extract the sugars and make them sweet.

We are looking to brown the mushrooms and onions and get the flavor that is created from the Maillard reaction.

mushrooms and onions sauted in a pan

How To Saute Mushrooms and Onions

Learn how to saute mushrooms and onions that will compliment a burger, chicken or steak.

5 from 1 vote
Print Pin Rate
Course: Main Course
Cuisine: American
Keyword: how to saute mushrooms and onions, Sauteing Mushrooms and onions
Prep Time: 10 minutes
Cook Time: 15 minutes
Servings: 4
Calories: 60kcal
Author: Bob


  • 1 white onion
  • 1 pkg mushrooms
  • 1 tbsp olive oil
  • 1 tsp salt
  • 1 tsp Fresh ground pepper
  • 3 tbsp chicken stock


  • Slice your mushrooms and onions into 1/8-1/4 inch slices
  • Heat up your oil on medium heat
  • Once the oil is hot add in your mushroom and onions
  • Let them brown up and flip around allowing them to all saute evenly
  • Deglaze the pan with chicken stock
  • Once they are browned they are ready to serve on top of your dish


  • Dont overcrowd your pan, if its to much do two batches or use a bigger pan.
  • Dont burn the bottom of pan before you deglaze. 
  • Dont cook to long your looking for sauted not caramelized.
  • Make sure pan and oil is hot before use.


Serving: 4g | Calories: 60kcal | Carbohydrates: 5g | Protein: 2g | Fat: 4g | Saturated Fat: 1g | Cholesterol: 1mg | Sodium: 602mg | Potassium: 232mg | Fiber: 1g | Sugar: 2g | Vitamin C: 3mg | Calcium: 6mg | Iron: 1mg

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