Do Mushrooms Go Bad? How Long Does It Last

logo by Editorial Staff | Updated on August 5th, 2022

So you got some mushrooms to add to your stir-fry. You barely use a handful of mushrooms in each recipe, so after a few days, you start to wonder: do mushrooms go bad?

Mushrooms come in a variety of shapes and sizes. Fresh mushrooms offer a deep taste to stews and stir-fries, canned mushrooms are excellent as appetizers, and dried mushrooms are frequently used in soups.

brown mushrooms on gray wooden table

And if you don’t buy mushrooms regularly, you may be confused about how to store them or how long they will stay, especially because there are so many different types on the market.

So, if you have any queries or concerns about mushroom storage, shelf life, or spoilage, this article is for you. It focuses on fresh mushrooms, although it also mentions canned and dried mushrooms. In other words, we’ve got your back.

Mushrooms: How Long Do They Last?

Let’s start with fresh mushrooms once more. They normally last 4 to 7 days but can extend up to 10 days. Once cooked (e.g., sautéed with green beans), they can be refrigerated for 3 to 5 days.

If you’ve been storing fresh portabellas in the fridge for about a week and are worried they’ll go bad, cook them. You’ll have a couple of additional days as a result of this.

Regarding canned mushrooms, the label usually includes a best-by date. And, because the product is canned, it may easily be stored for a few months after the expiration date without deterioration in quality. Finish the entire contents of the tin or jar within 4 to 7 days of opening it.

Last but not least, there are dried mushrooms. They frequently include a date on the label as well, which serves as a useful reference point. If there isn’t a date, presume they’ll keep their quality for around a year. In summary, dried mushrooms will not decay, but their quality will deteriorate with time.

Fresh mushrooms 4 – 7 days
Cooked mushrooms 3 – 5 days
Canned mushrooms (unopened)Best-by + 3 months 
Canned mushrooms (opened) 4 – 7 days
Dried mushroomsBest-by or 1 year 

How Long Can Mushrooms Be Stored In The Fridge?

Surprisingly, moisture is the most dangerous hazard to mushrooms in the refrigerator.

While mushrooms require a continual source of moisture to flourish in the wild, refrigerated mushrooms will produce an atrocious crop of slime if kept in a wet environment.

If you purchase pre-packaged mushrooms, store them in their original container in the refrigerator. It is best to avoid storing them in the crisper drawer, which is more humid.

The best and simplest approach to keep your mushrooms slime-free is to store them in paper bags.

Before transferring your capped mushrooms to a paper bag and refrigerating them, brush them briefly with a moist paper towel to remove any dirt.

On supermarket shop mushrooms, perforated plastic wrap will work, or you may punch a few holes in the retail container and consider it perforated.

Airflow is essential while determining how to keep mushrooms fresh. Fresh mushrooms may be kept in the fridge for up to two weeks if properly maintained, but for safety’s sake, eat them within 10 days and keep an eye out for symptoms of deterioration.

How Long Can Mushrooms Be Stored in the Freezer?

Because mushrooms contain so much water, freezing them uncooked can be challenging. Many mushrooms, such as shiitakes, can not resist freezing and will thaw into sludgy lumps.

If you sauté or blanch your mushrooms before freezing them, they may be readily added to soups and sauces for a rich taste.

Sauté your mushrooms until they’re a uniform golden color and all the liquid has disappeared from the pan. Once the mushrooms have cooled, place them in an airtight container and freeze.

Cooked mushrooms may be stored in the freezer forever, but for the greatest quality, they should be thawed and consumed within six to eight months.

How long does Fresh Mushrooms last?

The quality of fresh mushrooms impacts how long they will last in your refrigerator. Purchase high-quality mushrooms that are plump, have no slime or discoloration and have their caps intact.

Furthermore, if the mushrooms have been in the store for a while, they will last less time in your refrigerator.

Fresh mushrooms will keep their optimal freshness in the refrigerator for up to a week if stored properly. On the other hand, frozen mushrooms may be stored for up to a year.

How long do Sliced Mushrooms last?

Pre-sliced mushrooms decay faster than whole mushrooms, so utilize them within 3 to 5 days. Because mushrooms, like potatoes, brown fast, cut or buy pre-sliced mushrooms just before using.

How long do Cooked Mushrooms last?

Cooked mushrooms should be consumed within 3 to 4 days of preparation. For a prepared dinner, this is the widespread consensus. Examine the other components that go bad the quickest to see if the meal is still edible.

How long do Canned Mushrooms last?

When it comes to canned mushrooms, pay attention to the “best-before” date on the package. Of course, they will not go bad or rotten immediately after the date.

Canned mushrooms can be stored for several weeks to months after the expiration date. However, before using them, examine the packaging for signs of deterioration.

How to Recognize If Your Mushrooms Have Turned Bad

Here are several clear and not-so-obvious signals that your mushrooms should be discarded. When determining whether to preserve, cook, or discard your fungus, use your best judgment, but err on caution.

  • They’re filthy. When identifying freshness, the first rule of thumb is that when mushrooms get slimy, they are no longer edible. Sliminess is common on mushrooms that have been sitting in the fridge for an extended period. While they aren’t necessarily harmful at this stage, it’s still a good idea to throw them.
  • They have creases. Older mushrooms may not get slimy and instead dry out and wrinkle. While it’s fine to dry out your mushrooms somewhat (because they’re naturally wet), you don’t want them to get too wrinkled. If they appear faded, it’s better to dump them than eat them.
  • They’re darkening or have black patches. Dark patches indicate that your fungus is going bad. The greatest thing you can do is keep an eye on your mushrooms during their stay in the refrigerator. It’s time to utilize them or lose them if you see them becoming darker or growing black patches.
  • They’ve been here for at least two weeks. The prevailing view on mushroom shelf-life/storage duration is that two weeks in the fridge is the upper limit. Of course, you should use your best judgment and common sense. If it’s been over two weeks and they still look, smell, and feel normal, they’re okay to consume.
  • They have an odor. Your mushrooms should not have a strong or obvious odor. They’ve gone rotten if you can smell them. Of course, if you put your nose close up to them, you’ll detect a mushroom odor, but it should be mild and unobtrusive. If you take up the bag, open it, and turn your head, the mushrooms are awful. Take them out!

Is it possible to become sick from eating rotten mushrooms?

Moldy mushrooms are ruined and should not be consumed. These are not worth having on your plate since they have lost their nutrition and may cause food illness.

We never know whether or not a mold is hazardous. So it’s better to be safe than sorry.

How to Keep Mushrooms From Turning Bad

  • Quickly store them. Refrigerate the mushrooms as soon as possible after obtaining them at the market or grocery shop. You’d want to keep them cool.
  • Keep them in an airtight container. They are often packaged in a container with air holes in the plastic wrap. Don’t place them in an airtight container when you bring them home.
  • Use them right away. As with other products, preparing them as quickly as possible is best. It is usually ideal for shopping for vegetables a couple of times per week.

How Do I Select Fresh Mushrooms at the Grocery Store?

It all boils down to using your senses. You want to ensure they don’t stink and aren’t damaged or slimy.

I seek packets of mushrooms with the closest date to the current date. When they put them on the shelf, they usually mark them.

If I buy organic mushrooms, I want to get the greatest deal possible!

The cremini mushroom is my favorite of all the mushrooms. It has a strong taste and is related to the white button mushroom. Most people associate it with baby Bella.

How Should Mushrooms Be Stored?

Mushrooms spoil fast if they are not handled or kept correctly. Here are a few pointers to help you store your mushrooms properly:

1. Select the Proper Storage Container

Because fresh mushrooms have a high water content, you should be cautious about the container you choose to keep them.

Although airtight containers and plastic bags are common options for packing food for refrigeration, they are not ideal for preserving mushrooms. This type of packaging traps moisture on the surface of the mushrooms, reducing their shelf life.

A brown bag is a perfect container for storing fresh mushrooms. The bag will absorb moisture from the mushrooms, preventing them from rotting. Just keep the bag open at the top, and don’t stuff too many mushrooms in there. The fresh fungus can be kept in the refrigerator for up to a week.

Alternatively, you can keep mushrooms in their original packing from the shop. These are typically intended to provide an appropriate quantity of air while preventing excessive dampness.

2. Store at the Appropriate Place

Fresh mushrooms should always be stored in the refrigerator. However, where you put them in the fridge has a significant effect.

We recommend storing mushrooms in the refrigerator’s main compartment rather than the crisper, which is excessively damp and can cause the mushrooms to become soggy and eventually rot.

3. Make Enough Space in the Fridge

Other containers should not be placed on top of the mushrooms as this may cause bruising and quick deterioration. Make room in your refrigerator for optimum circulation of chilly air, which can help mushrooms last longer.

4. Dry it

If you have a lot of mushrooms but not a lot of freezer space, drying them is a terrific technique to keep them fresher for longer. Dried mushrooms are just as delicious and healthful as fresh ones.

Begin by washing the mushrooms, then bake them at 17 degrees Celsius for 3-5 hours, or until there is no evidence of water. Allow cooling completely before storing in an airtight container. Place in the pantry until ready to use.

5. Freeze it

Fixing is the next best option when drying is out of the question. Fresh mushrooms should be frozen as soon as possible since the longer they stay out, the more they decay, and freezing will not stop this process once it has begun. In a moment, we’ll teach you how to freeze mushrooms properly.

6. Maintain High Hygiene Standards

Because mushrooms lack an exterior covering that can be peeled away, they can become infected and dangerous to use.

Mushrooms are best stored unwashed, according to experts. So, before touching your mushrooms, make sure to clean and dry your hands, especially if they are moist.

We also recommend that you store your mushrooms entirely. Cutting, peeling, or removing the stalk causes bruising and dramatically reduces the shelf life of the fungus.

Can Mushrooms Be Frozen?

Fresh mushrooms don’t have a long shelf life, so freezing them to keep them fresher for longer makes sense.

The simplest method to do this is to clean them thoroughly, slice them, then steam or sauté them in butter for a few minutes until they wilt.

Once the mushrooms have cooled slightly, place them in an airtight container or freezer bag and place in the freezer. This way, they’re almost ready to go when you defrost them.

If you’re freezing a large quantity, try splitting it into several meal-sized portions for easier defrosting and use.

As is customary, the safest way of thawing is overnight in the refrigerator.


Mushrooms have a short shelf life and should be consumed as soon as possible after purchase. If you need easy access to fresh, ready-to-eat mushrooms, refrigerate them in a brown bag or prepare and freeze.

Remember to err on caution and reject mushrooms that have been in the fridge for an extended period or show indications of deterioration.


Editorial Staff

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