How to Store Cooked Mushrooms (Refrigerator & Freezer Tips)

Cooked mushrooms are a quintessential part of many recipes, whether they’re sautéed in butter and added atop a fancy steak dinner or used in a delicate risotto.

Mushroom lovers will have no problem eating these earthy, savory goodies on their own, either.

But if you’ve just whipped up a batch of delicious cooked mushrooms and want to save some for later, you might wonder – how long are cooked mushrooms good for?

With proper storage, cooked mushrooms can last up to 10 days in the fridge and 12 months in the freezer. They shouldn’t be left at room temperature for longer than 1 hour at temperatures above 90 degrees or 2 hours below 90 degrees.

Room TempRefrigeratorFreezer
1 to 2 hoursUp to 10 daysUp to 12 months

Knowing how long cooked mushrooms are good will make the difference between enjoying leftovers and sinking your teeth into slimy, disgusting mushrooms. 

With that in mind, keep reading to discover essential information such as how long cooked mushrooms are good for, how to store them properly, and when to chuck them into the garbage bin.

How Long Are Cooked Mushrooms Good For?

Like every other vegetable you’ll buy at the grocery store, mushrooms have a definitive shelf life.

Of course, the shelf life is altered once cooked. That said, how long are cooked mushrooms good for at room temperature, the refrigerator and freezer?

How Long Can Cooked Mushrooms Last at Room Temperature?

As a general rule of thumb, cooked mushrooms should be discarded if left at room temperature for longer than 2 hours.

At this point, bacteria can begin to grow rapidly, rendering your mushrooms inedible (and unsafe).

However, keep in mind that temperature and humidity levels can impact how long mushrooms last at room temperature.

Cooked mushrooms stored at room temperature where temperatures are above 90F will need to be discarded within an hour.

How Long Can Cooked Mushrooms Last in the Fridge?

The fridge is always the go-to for extending the shelf life of perishable foods, including mushrooms.

When stored properly, cooked mushrooms can last up to 10 days in the fridge.

While they will be safe to consume up to the ten-day mark, eating during the first two to three days is recommended.

At this point, mushrooms will still be at their peak of freshness and have the desired taste, texture, and smell. 

Also, keep in mind that shelf life will alter depending on whether the cooked mushrooms are stored with other ingredients.

For example, if you cook a steak along with your mushrooms and store them together, you will base the shelf life of the steak, which is anywhere from 3 to 5 days in the fridge.

How Long Can Cooked Mushrooms Last in the Freezer?

If you’re not planning to use your cooked mushrooms within ten days, your last option is to store them in the freezer.

With proper storage, cooked mushrooms can last up to 12 months in the freezer.  

In fact, cooked mushrooms can easily be stored for longer than 12 months in the freezer.

The drawback is that the longer they sit in the freezer, the more the quality begins to deteriorate.

Like refrigerated cooked mushrooms, it is better to eat frozen cooked mushrooms sooner than later.

How to Thaw Frozen Cooked Mushrooms Properly?

If you opt to store your cooked mushrooms in the freezer, it’s important to know how to thaw them and use them correctly (and safely). 

Frosen mushrooms

The best option is to thaw frozen cooked mushrooms in the fridge for up to 3 or 4 days. Do not use it beyond the 4th day as they will likely be unsafe for consumption.

You also have the option of cooking directly from frozen. This will ensure that the mushrooms stay plump, hardy, and delicious without fear of undesirable floppy or limp textures.

Once heated, cooked mushrooms cannot be stored for a second time.

Can You Eat Cooked Mushrooms After 3 Days? 

You can safely consume cooked mushrooms after three days as long as they are stored properly.

If you’re planning to eat your cooked mushrooms within three days of cooking, the best location is in the refrigerator. 

How Long Do Cooked Stuffed Mushrooms Last?

Unfortunately, cooked stuffed mushrooms do not have the same longevity as cooked sliced mushrooms.

Stuffed mushrooms can last up to 5 days in the fridge when stored properly in an airtight container. They should not be left at room temp for longer than 2 hours.

It is not recommended to freeze cooked stuffed mushrooms as the quality will deteriorate immensely.

It is best to freeze stuffed mushrooms before cooking for up to three months.

How Long Do Cooked Portobello Mushrooms Last?

Cooked Portobello mushrooms also have a shorter shelf life than other cooked mushrooms (button, crimino, etc.).

Cooked Portobello mushrooms will last up to 5 days in the fridge or 6 months in the freezer with proper storage.

TypeRoom TempRefrigeratorFreezer
Stuffed MushroomsUp to 2 hoursUp to 5 daysNot recommended
Portobello MushroomsUp to 2 hoursUp to 5 daysUp to 6 months

Do Cooked Mushrooms Last Longer Than Raw Mushrooms?

This is a tricky question, as the shelf life changes depending on whether or not the raw mushrooms are sliced or whole.

Mushroom in Pot

Compared to raw whole mushrooms, cooked mushrooms have the same shelf life: up to 10 days in the fridge.

Compared to raw sliced mushrooms, cooked mushrooms last longer. Raw sliced mushrooms only have a shelf life of up to 7 days and are best used within 3 to 5 days.

Whole MushroomsSliced MushroomsCooked Mushrooms
Up to 10 daysUp to 7 daysUp to 10 days

How to Store Cooked Mushrooms

Proper storage is critical for success, whether you’re leaving them on the countertop for five minutes, sticking your cooked mushrooms in the fridge, or extending the lifespan incredibly by storing them in the freezer.

When it comes to storing cooked mushrooms, you have two options:

  • A shallow airtight container
  • Resealable freezer bag

Your preferred storage option must have an airtight seal to block out air and freezer burn. Otherwise, your mushrooms will deteriorate at a much quicker rate.

Additional Storage Tips

To ensure you get the most extended shelf life from your cooked mushroom, follow these simple tips:

Cool Before Storing

It can also cause your mushrooms to become off-puttingly slimy and disgusting. 

Make sure the temperature is 40F or below (fridge) or 0F (freezer)

The “danger zone” is between 40F and 140F, so your cooked mushrooms must be held at a degree below 40F in the refrigerator. Double-check the temperature of your fridge before storing.

When freezing, ensure your freezer is kept at a constant 0F. Any fluctuations can cause the shelf life to be shortened.

Store Mushrooms in the Back of your Fridge – Not the Side Door

The side door of your refrigerator sees plenty of temperature fluctuations, which is not ideal for cooked mushrooms.

To be on the safe side, always store your container of cooked mushrooms in the back of the fridge on a shelf where temperatures remain constant.

How Do You Know if Cooked Mushrooms Are Bad?

Even with proper storage, cooked mushrooms won’t last forever. Knowing whether your cooked mushrooms are still good is essential for your health (and whether you’ll enjoy a tasty dinner or not). 

Mushrooms that have gone bad will have a change in appearance, develop a slimy or mushy texture, emit an odd scent, or even display mold. 

Here is a closer look at some of the tell-tale signs your cooked mushrooms have gone bad.

Changes in Appearance

The first noticeable sign that your cooked mushrooms have gone bad is a change in appearance.

Your cooked mushrooms may take on a wrinkled appearance. There may also be “spotting,” typically brown or white in color. 

Any change in appearance is an indicator that your cooked mushrooms are no longer safe to consume and should be tossed immediately. 

Slimy or Mushy Texture

Depending on which recipe you use, it can be difficult to notice changes in your cooked mushrooms’ appearance.

If that’s the case, check your mushrooms for signs of sliminess or mushiness.

Odd Scent

The last indicator of rotten cooked mushrooms – and perhaps the easiest way to identify if your cooked mushrooms are still safe to eat or not – is the scent.

When opening the container, take a good whiff of your mushrooms. Don’t risk it if they smell anything like they’re “supposed” to.

As the common terminology says, “When in doubt, throw it out.” This statement holds true for cooked mushrooms.


If there is any sign of mold present on your cooked mushrooms, discard them immediately.

This is true even if mold is spotted on a single mushroom. Do not consider tossing the moldy mushroom and eating the rest of the batch. 

What Happens if You Eat Old Cooked Mushrooms?

Eating old cooked mushrooms can lead to uncomfortable gastrointestinal illnesses such as diarrhea, vomiting, and nausea. In some rare cases, the damage can be more serious.

In very rare cases, consumption of old cooked mushrooms can lead to botulism, a serious bacterial infection that requires immediate medical attention.

Botulism occurs a few hours to days after consumption, resulting in fever, weakness, blurred vision, shortness of breath, paralysis, etc.

Another potential health issue is salmonella poisoning. Salmonella can cause a wide range of symptoms, including excessive diarrhea, bloody stools, and vomiting, eventually leading to dehydration.

That said, it is essential to ensure you do not consume spoiled cooked mushrooms

Final Words

Cooked mushrooms bring out a highly desirable flavor that’s great alone or added to a favorite dinner. However, they don’t last forever.

Cooked mushrooms can only last up to 2 hours at room temperature, up to 10 days in the fridge, or up to 12 months in the freezer (with proper storage).

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