Mushroom Lifespan: How Long Do They Last?

Mushrooms are a versatile ingredient used in various dishes, from salads and stir-fries to sauces and soups. However, their high water content and sponge-like quality make them challenging to store, and they can quickly turn soggy and slimy. Proper storage is essential to prevent spoilage and prolong their shelf life. So, how fast do mushrooms spoil, and what are the best ways to store them? Let's delve into the world of fungi to find out.

Proper storage methods

Mushrooms are highly perishable, and improper storage can lead to slime formation, discolouration, and mould. Here are some proper storage methods to keep mushrooms fresh for longer:

Paper Bag Storage

Storing mushrooms in a paper bag is one of the most recommended methods. Paper bags absorb excess moisture released by mushrooms as they age, preventing the formation of slime. You can use a brown paper bag, with or without paper towels. Lining the bag with paper towels can help absorb moisture and keep the mushrooms dry. This method can keep mushrooms fresh for about 10 days in the refrigerator.

Net Bag Storage

Using a net bag, such as the kind onions are often sold in, is another effective way to store mushrooms. The mesh material allows for air circulation, preventing moisture buildup. You can hang the net bag from a hook or nail in a cool, dry place.

Refrigerator Storage

Mushrooms should be stored in the refrigerator to extend their shelf life. Place them on a shelf in the fridge, ensuring they are not in a sealed container or plastic bag, as this can trap moisture and accelerate spoilage. If you have pre-packaged mushrooms, simply place the entire package in the refrigerator, as these packages are designed with perforations to allow air circulation.

Dehydration and Freezing

If you have a large quantity of mushrooms and want to store them for an extended period, dehydration and freezing are good options. Dehydrated mushrooms can be stored in a mason jar and vacuum-sealed for long-term storage. To use, simply rehydrate them with boiling water. Freezing mushrooms is also an option, but it may alter their texture, making them better suited for flavouring stocks or patties rather than frying.

Signs of spoilage

Mushrooms are primarily made of water and are highly porous, which makes them susceptible to spoilage. They are best consumed fresh, but can be stored in a refrigerator for anywhere between three to seven days. However, certain factors can cause them to spoil faster. Here are some signs of spoilage to look out for:

Sliminess and Softness

Mushrooms can become slimy and soft due to incorrect storage or prolonged refrigeration. While slight sliminess can be salvaged by cooking the mushrooms, it is best to discard them if they exhibit other signs of decomposition or have an unpleasant odour.

Discolouration

Spoiled mushrooms may exhibit discolouration. This could be in the form of a sticky or mouldy surface, or shrivelling. Discolouration is also a sign of spoilage in magic mushrooms, where the psychoactive compounds degrade over time due to exposure to heat, light, and moisture.

Soggy Texture

Mushrooms have a sponge-like quality, and their high water content makes them prone to becoming soggy, especially if washed with water before storage. To prevent this, wipe mushrooms with a dry paper towel or cloth to remove dirt and grime, and store them in a paper bag to absorb any excess moisture.

Unpleasant Odour

Mushrooms that have spoiled will often emit an unpleasant odour. This is due to the growth of bacteria, which can also cause the mushrooms to taste bad. Consuming spoiled mushrooms can lead to nausea, vomiting, and intestinal discomfort, so it is important to check for any signs of spoilage before cooking or eating them.

How to salvage seemingly spoiled mushrooms

Mushrooms are a great ingredient to add an earthy, umami-rich flavour to your dishes. However, they are perishable and can show signs of spoilage quickly. So, what do you do when you find your mushrooms have gone a bit off? Here are some tips on salvaging seemingly spoiled mushrooms:

Firstly, it is important to identify the extent of spoilage. If the mushrooms have developed an unpleasant odour or exhibit signs of mould, it is best to discard them as they could make you sick. Mushrooms that are slimy, smelly, or mouldy are not safe to eat and can cause food poisoning or botulism.

Now, if your mushrooms are just a little past their prime and starting to lose freshness, there are some ways to salvage them. One way is to cook them in dishes where they will be mixed with other ingredients and flavours. Soups, sauces, chillies, and omelettes are great options for using up mushrooms that are not in perfect condition. The key is to ensure that the mushrooms are cooked well and that any unpleasant flavours or textures are masked by the other ingredients.

Another way to salvage slightly spoiled mushrooms is to marinate them. A marinade can help preserve mushrooms and enhance their flavour. A simple marinade can be made with oil, vinegar, maple syrup, and dry seasoning. You can also flash-freeze your mushrooms to prolong their shelf life. While this may affect their texture, it is a good option if you need to store them for a more extended period.

When storing fresh mushrooms, it is essential to keep them in a paper bag in the fridge. Plastic bags or sealed containers should be avoided as they trap moisture, leading to rapid spoilage. A paper bag helps to keep moisture at bay, and a paper towel-lined bag is even more effective at preventing sliminess.

Remember, always err on the side of caution. If you have any doubts about the safety of your mushrooms, it is better to discard them than risk food-borne illnesses.

How to dry mushrooms

Mushrooms are a great ingredient to add an earthy, umami-rich flavour to your dishes. However, they can go bad pretty quickly. To avoid wasting mushrooms, you can dry them and store them for later use. Here is a detailed guide on how to dry mushrooms:

Choose a Drying Method

You can dry mushrooms using a dehydrator, an oven, or by air-drying them. Air-drying mushrooms is the simplest method as it does not require any special equipment. However, it may take a longer time, and the results may vary depending on the humidity levels. If you live in a humid place, it is recommended to air-dry mushrooms during the fall, winter, and spring seasons.

Prepare the Mushrooms

Start with fresh mushrooms and wipe them clean with a damp cloth. Do not wash them under running water.

Allow Air Circulation

Place the cleaned mushrooms in a container that allows air to circulate around them, such as a mesh colander or a baking rack set on a baking sheet. Make sure not to overcrowd the mushrooms.

Choose a Well-Ventilated Area

Place the container with the mushrooms in a well-ventilated area, preferably with access to fresh air and sunlight.

Patience is Key

Allow the mushrooms to air-dry for 7-10 days, or until they are completely dry. The drying time will depend on the humidity levels and the size of the mushrooms. You will know they are ready when they feel dry to the touch and do not give at all when squeezed. They should feel like little light rocks.

Storing Dried Mushrooms

Once the mushrooms are completely dry, you can store them in airtight containers or jars in a cool, dry place. Properly dried mushrooms can last up to 2 years or even longer!

By following these simple steps, you can easily dry your mushrooms and extend their shelf life, reducing waste and always having some on hand to add a delicious umami flavour to your dishes.

How long mushrooms last in the fridge

Mushrooms are a versatile ingredient in the kitchen, adding an earthy, umami-rich flavour to a variety of dishes. However, their high water content means they can spoil quickly and become slimy, or even develop dark spots and mould. Proper storage is key to keeping mushrooms fresh for longer.

Whole, raw mushrooms will typically last 4-7 days in the fridge, but some sources suggest they can last up to 10 days or even two weeks. Sliced raw mushrooms have a much shorter shelf life of 1-2 days, while cooked mushrooms can last 7-10 days. It's important to note that mushrooms in a dish with other ingredients that spoil quickly may expire sooner.

To maximise the shelf life of raw mushrooms, they should be stored in a porous container or paper bag in the refrigerator. Paper towels can be used to absorb excess moisture, and they should be wrapped loosely to promote air circulation. Plastic bags and sealed containers should be avoided as the lack of airflow will speed up spoilage.

If you want to keep mushrooms for longer, you can dehydrate them, which will make them last as long as you need. They can also be frozen, but many mushrooms will lose their structure and become mushy when thawed. To avoid this, mushrooms can be cooked, blanched, sautéed, poached, or steamed before freezing.

Frequently asked questions