Freezing mushrooms is an excellent way to preserve their freshness and flavor for an extended period. Whether you’ve harvested a bumper crop from your garden or stumbled upon a great deal at the grocery store, knowing how to freeze mushrooms properly can come in handy. In this article, we will guide you through the steps to freeze mushrooms the right way, ensuring that they retain their quality and taste when thawed.

How to Freeze Mushrooms the Right Way

Choosing the Right Mushrooms for Freezing

Before diving into the freezing process, it’s essential to select the right mushrooms. Opt for fresh, firm mushrooms that are free from any bruises or blemishes. Avoid mushrooms that appear slimy or have a strong odor, as these may indicate spoilage.

Different mushroom varieties freeze better than others. Some varieties that freeze well include button mushrooms, cremini mushrooms, and shiitake mushrooms. However, delicate mushrooms like enoki or maitake may not hold up as well in the freezing process. Once you have chosen your mushrooms, it’s time to prepare them for freezing.

Cleaning and Preparing Mushrooms for Freezing

Start by gently brushing off any dirt or debris from the mushrooms using a soft brush or a paper towel. Avoid washing mushrooms as they are like sponges and tend to absorb water, which can affect their texture when thawed.

Next, trim the stem ends of the mushrooms if desired. While not necessary, this step can improve the overall appearance of the frozen mushrooms.

Blanching Mushrooms

Blanching is a crucial step in the freezing process, as it helps preserve the color, texture, and flavor of the mushrooms. Blanching involves briefly immersing the mushrooms in boiling water and then immediately cooling them in ice water.

To blanch the mushrooms, bring a pot of water to a rolling boil. Add the cleaned mushrooms to the boiling water and let them cook for a short time. The exact blanching time will vary depending on the mushroom variety and size.

For small button mushrooms, blanch them for 2 minutes, while larger mushrooms may require up to 4 minutes. It’s crucial not to overcook the mushrooms during blanching, as they can become mushy and lose their texture.

Cooling and Draining

Once the blanching time is up, quickly transfer the mushrooms to a bowl of ice water. This process stops the cooking process and helps retain their color and texture. Allow the mushrooms to cool in the ice water for the same amount of time they were blanched.

After cooling, drain the mushrooms thoroughly to remove excess moisture. Excess water can lead to ice crystals forming during freezing, which can affect the quality of the mushrooms. Pat them dry with a paper towel or use a salad spinner to remove as much moisture as possible.

Packaging for Freezing

Proper packaging is essential to protect the mushrooms from freezer burn and prevent them from absorbing odors from other foods in the freezer. Use airtight containers or freezer bags specifically designed for freezing.

If using containers, leave some headspace to accommodate expansion during freezing. For freezer bags, squeeze out as much air as possible before sealing.

Label the containers or bags with the date of freezing and the type of mushrooms inside. This labeling will help you keep track of the storage duration and easily identify the contents when you need them.

Freezing Techniques

It’s important to freeze the mushrooms as quickly as possible to ensure the best quality. Place the packaged mushrooms in the coldest part of your freezer, preferably at or below 0°F (-18°C). This rapid freezing helps preserve the texture and flavor of the mushrooms.

The storage duration for frozen mushrooms varies depending on the variety. Generally, frozen mushrooms can be stored for up to 12 months without significant loss of quality. However, it’s ideal to use them within 6 to 9 months for the best taste and texture.

Avoid frequent temperature fluctuations by keeping the freezer door closed as much as possible. Fluctuating temperatures can cause ice crystals to form, leading to freezer burn and declining quality.

Thawing and Using Frozen Mushrooms

When you’re ready to use the frozen mushrooms, it’s essential to thaw them properly to maintain their texture and flavor. Avoid thawing mushrooms at room temperature, as this can promote bacterial growth.

The safest method for thawing frozen mushrooms is to transfer them to the refrigerator and allow them to thaw slowly overnight. Thawing in the refrigerator helps preserve the mushrooms’ quality and reduces the risk of bacterial growth.

If you’re in a hurry, you can also thaw mushrooms under cold running water. Place them in a sealed bag and submerge them in cold water for about 30 minutes, replacing the water every 10 minutes. This method is quicker than thawing in the refrigerator but requires more attention.

Once thawed, mushrooms can be used in a variety of dishes. They work well in soups, stews, stir-fries, pasta dishes, and omelets. However, keep in mind that the texture of thawed mushrooms may be slightly softer compared to fresh ones.

To preserve the flavor and texture of thawed mushrooms, avoid overcooking them. Add them towards the end of the cooking process to prevent them from becoming mushy.

Additional Tips and Tricks

While blanching is the recommended method for freezing mushrooms, some mushroom varieties, like oyster mushrooms or portobello mushrooms, can be frozen without blanching. These varieties retain their texture and flavor without blanching, making the freezing process quicker and more convenient.

If you prefer using frozen mushrooms directly in certain dishes, such as sauces or gravies, you can sauté them straight from frozen. This method helps retain their flavor and texture without the need for thawing.

To extend the shelf life of frozen mushrooms, ensure that they are stored in a consistently cold freezer and are well protected from air and moisture. Regularly check the temperature of your freezer and maintain it at the optimal freezing temperature.

Frequently Asked Questions

Q: Can you freeze mushrooms without blanching?

A: While blanching is recommended for most mushroom varieties, certain mushrooms like oyster mushrooms or portobello mushrooms can be frozen without blanching.

Q: How long can frozen mushrooms be stored?

A: Frozen mushrooms can be stored for up to 12 months without significant loss of quality. However, for the best taste and texture, it’s ideal to use them within 6 to 9 months.

Q: Can you freeze cooked mushrooms?

A: Yes, you can freeze cooked mushrooms. Follow the same packaging and freezing techniques mentioned earlier, ensuring that the cooked mushrooms are completely cooled before freezing.


Freezing mushrooms is an excellent way to enjoy their flavors throughout the year. By following the proper techniques for freezing, blanching, and packaging, you can ensure that your frozen mushrooms retain their quality and taste when thawed. If you enjoy mushrooms or want to preserve a mushroom harvest, freezing them correctly will enable you to relish their natural flavor even when they’re not in season. Therefore, gather fresh mushrooms, prepare your freezer, and appreciate the convenience of having mushrooms readily available whenever you require them.

Read more: What Are King Oyster Mushrooms?

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