Can out-of-date mushrooms make you sick? (+3 Ways to tell)

In this article, we will answer the question “Can out-of-date mushrooms make you sick?”, and how to tell If the mushrooms are bad?

Can out-of-date mushrooms make you sick?

Yes, out-of-date mushrooms can make you sick If they are spoiled. You may experience stomach pain, diarrhea, vomiting, and nausea. Consuming canned mushrooms that have gone bad can cause botulism which can prove to be fatal. 

Symptoms of foodborne botulism include difficulty speaking or swallowing, paralysis, dry mouth, double or blurred vision, difficulty breathing, drooping eyelids, etc. they appear within 12-36 hours of consuming bad mushrooms.

Before consuming out-of-date mushrooms, look for signs of spoilage. If the mushrooms were stored correctly, they might be good to eat. To be sure, cook the mushrooms before eating. If you notice even a single sign of spoilage in the slightest, discord the mushrooms immediately.

How long do mushrooms last?

Fresh whole mushrooms7-10 days
Fresh sliced mushrooms 5-7 days 
Cooked mushrooms 7-10 days 
Dried mushrooms 2-3 years 

How to tell If mushrooms are bad?

Spotting signs of spoilage 

  • If the mushrooms look dried out and shriveled, use them immediately because they will go bad before you know it since they are on the edge of spoilage. 
  • Use the mushrooms after cutting out the bruised parts. However, once you notice the mushrooms have start to develop black or brown spotting, discard them. 
  • Slimy mushrooms have mold growing on them. Thye is even disgusting to look at. Throw them in the bin immediately as they are unsafe for consumption.
  • If your mushrooms give off a fishy or pungent smell instead of a sweet and earthy smell, consider throwing them away before they contaminate other food items in your fridge.

Keeping track of shelf-life

  • Fresh mushrooms of varieties such as white, cremini, and portabella mushrooms will stay good in the fridge for about a week. 

But this is not always the case. Especially If you bought old mushrooms that had been sitting on the store shelf for very long. To avoid this problem, buy the freshest-looking mushrooms. Read the sell-by date.

  • Whole mushrooms have twice as long a shelf life as sliced mushrooms. Now you know what to purchase If you are looking for a longer shelf-life.
  • Cooked mushrooms must be refrigerated within 2 hours of cooking and reheated to a safe temperature of 165 °F (74 °C). 

Cooked leftover mushrooms should not be stored for more than 3-4 days in the fridge. This also applies to cooked leftovers of meat, seafood, and veggies. Cooked broccoli and asparagus spoil within 1-2 days.

  • Gourmet mushrooms like chanterelles and oysters only last 12-24 hours. They are expensive as compared to buttons or baby Bellas. Therefore, use them up before they go bad. 

However, a few gourmet varieties including morel and shitake mushrooms will last 1-2 weeks. It is recommended to consume the as soon as possible for best quality.

Storing mushrooms safely

  • Always store the mushrooms in the fridge. Your fridge should maintain a steady temperature below 40 °F (4 °C) for safe storage of mushrooms and other perishables. Place the mushrooms on the fridge’s shelf instead of the crisper drawer.
  • The original packaging of the mushrooms is designed to protect them against moisture while allowing ventilation. Therefore, do not take the mushrooms out of their packaging before storage. 

Poke a hole in the packaging and take out as many mushrooms as you want. Cover this hole with a plastic wrap/sheet afterward.

  • Loose mushrooms should be kept in a partially opened sealable bag to promote ventilation.
  • Do not let the mushrooms anywhere near meat and seafood during storage, preparation or handling. Mushrooms can be easily contaminated. 

The risk becomes higher If the mushrooms are to be consumed uncooked. Besides, mushrooms pick up odors easily.

Other FAQs about Mushrooms which you may be interested in.

How long do mushrooms last in the fridge?

Can you eat the gills of a portobello mushroom?

Can you eat elephant ear mushrooms?

How to cook mushrooms?


  • 8 ounces mushrooms such as cremini, shitake, or Portobello (about 2 1/2 cups chopped or sliced)
  • 1 tablespoon extra-virgin olive oil
  • 1/4 teaspoon sea salt or more to taste
  • Fresh ground black pepper


  • 1 tablespoon butter
  • 1 garlic clove, minced
  • 2 teaspoons fresh thyme leaves or 1/2 teaspoon dried
  • 1 tablespoon fresh grated lemon zest
  • Juice of half a lemon


  1. Wipe any first or dust off of the fresh mushrooms. Remove the hard stems. Cut the mushrooms into 1/4-inch thick slices. Cut 1/4-inch cubes if you are using portobello mushrooms.
  1. Season a skillet with some olive oil on medium heat. Toss the mushrooms into the heated oil. Let them cook for 3-5 minutes or until golden brown from one side. Then stir to cook from the other side.
  1. Sprinkle some salt and pepper for seasoning.


In this article, we answered the question “Can out-of-date mushrooms make you sick?”, and how to tell If the mushrooms are bad?


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