
Freezing porcini mushrooms is a great way to preserve your harvest and make delicious dishes in the winter. The process involves cleaning, washing, and boiling the mushrooms before freezing them in portions to avoid re-freezing. Some people also fry or roast the mushrooms before freezing. Freezing porcini mushrooms can help retain their taste, colour, smell, and nutritional value. However, it is important to note that frozen mushrooms might not be as good as fresh ones, and some varieties freeze better than others.
| Characteristics | Values |
|---|---|
| Purpose | Preserve porcini mushrooms for consumption during winter |
| Pros | Retains taste, colour, smell, nutritional value, and saves freezer space |
| Cons | Frozen mushrooms are never as good as fresh, lose volume, and cannot be refrozen |
| Cleaning | Thoroughly clean mushrooms with a soft brush or washcloth, removing forest debris, twigs, earth, and leaves |
| Washing | Wash several times in cold water with lemon juice or vinegar essence, avoid soaking |
| Boiling | Boil in salted water for 5-30 minutes, cool in cold water, pat dry, and cut into cubes |
| Roasting | Splash oil on a baking sheet, add mushrooms, stir for uniform browning, roast until juice stops flowing |
| Freezing | Lay out on a tray, freeze, then transfer to vacuum or freezer bags, or boil and store in containers |
| Defrosting | Defrost in the refrigerator or at room temperature, use frozen for cooking by immersing in boiling water |
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What You'll Learn

Cleaning and preparing porcini mushrooms for freezing
Fresh porcini mushrooms are best eaten on the day of purchase, but they can be stored for up to two days in a dry, cool place. If you wish to store them for longer, freezing is an option. Here is a step-by-step guide to cleaning and preparing porcini mushrooms for freezing:
Cleaning Porcini Mushrooms
Porcini mushrooms have a smooth brown top, light grey gills, and a thick, sturdy stem with a circular cap and a spongy underside. When cleaning porcini mushrooms, it is recommended not to wash them under water, as they are spongy and will absorb it, affecting their flavour. However, if the mushrooms are very dirty, you can rinse them briefly under a stream of running water and then dry them.
To clean porcini mushrooms, first remove any forest debris such as twigs, earth, and leaves. Then, use a smooth, sharp knife to slice off a thin layer at the bottom of the mushrooms if it is covered in dirt. Next, dust off any remaining excess dirt with a firm brush or wipe it off with a clean, damp kitchen towel. You can also rinse the mushrooms under cold water, but this should be avoided if possible, as it can affect the flavour. After rinsing, carefully pat the mushrooms dry with a kitchen towel.
Preparing Porcini Mushrooms for Freezing
There are several methods for preparing porcini mushrooms for freezing. One option is to boil the mushrooms before freezing. To do this, cut the cleaned mushrooms into medium-sized cubes and boil them in salted water for 15 to 30 minutes. You can also add a small amount of vinegar or lemon juice to the water before boiling. After boiling, drain the mushrooms and allow them to cool.
Another method is to freeze the mushrooms raw. To do this, cut the cleaned mushrooms into small pieces and place them on a cookie sheet lined with parchment paper, a silicone mat, wax paper, or a non-stick tray. Freeze the mushrooms, and once they are frozen, transfer them to a vacuum bag or freezer bag.
You can also sauté or fry the mushrooms before freezing. To do this, cook the mushrooms in butter, lard, or oil with a pinch of salt before freezing to help remove some of the water they contain. This will improve the texture of the mushrooms after thawing.
Regardless of the preparation method, it is important to portion the mushrooms into single-use amounts before freezing. This will help to avoid wasting mushrooms and will make it easier to use them in recipes.
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Boiling porcini mushrooms before freezing
Porcini mushrooms are a delicacy that can be enjoyed fresh, dried, or frozen. Freezing is a great way to preserve your harvest and make the most of your mushroom foraging.
When it comes to freezing porcini mushrooms, there are a few different methods you can use. Some sources suggest freezing them raw, while others recommend boiling them before freezing. If you choose to boil them, here is a step-by-step guide:
Cleaning and Preparing the Mushrooms
First, you'll need to clean your freshly harvested or purchased porcini mushrooms. Use a damp cloth or soft brush to gently remove any dirt, soil, or forest debris. You can also rinse them briefly with cold water, but avoid soaking them as this can affect their texture and aroma. Trimming the ends of the stems is also recommended to ensure they are clean.
Boiling the Mushrooms
Fill a pot with water and bring it to a boil. You can add a pinch of salt to the water, and some sources suggest adding a bit of acid, such as lemon juice or vinegar. Carefully place the cleaned mushrooms into the boiling water and let them cook for around 5-30 minutes, depending on their size and your preference. Keep in mind that boiling will reduce their volume.
Cooling and Drying the Mushrooms
After boiling, remove the mushrooms from the heat and let them cool down. You can place them in a pan with cold water to speed up the cooling process. Once they are cooled, make sure to dry them thoroughly. You can use paper towels or a clean cloth to absorb any remaining moisture.
Cutting and Freezing the Mushrooms
Once your mushrooms are clean, dry, and cooled, it's time to cut them into your desired size. You can slice them into thin pieces or quarter them, depending on how you plan to use them later. Spread the cut mushrooms in a single layer on foil or a baking sheet and place them in the freezer. Leave them until they are completely frozen, which usually takes about an hour or two.
Storing the Frozen Mushrooms
Once the mushrooms are frozen solid, transfer them to freezer-safe bags or containers. Squeeze out as much air as possible to prevent freezer burn. Label the bags with the date, and try to use the mushrooms within a year for the best quality.
Using the Frozen Mushrooms
When you're ready to use your frozen porcini mushrooms, simply take them out of the freezer and add them directly to your dish. There's no need to thaw them first, as they will cook in the same amount of time as fresh mushrooms. You can use frozen porcini mushrooms in soups, stews, risottos, pasta dishes, and more, enjoying their rich and earthy flavor all year round.
Remember, freezing boiled porcini mushrooms is just one method, and you can also choose to freeze them raw or incorporate them into cooked dishes before freezing. Each method has its advantages, and you may want to experiment to see which one best suits your needs and taste preferences.
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Freezing porcini mushrooms raw
Porcini mushrooms are a delicious and beloved type of wild mushroom found almost everywhere, from Alaska to Uganda and Siberia to Mexico. Freezing porcini mushrooms raw is an easy and convenient way to store them for later use and can preserve their flavour and texture for up to a year.
- Clean the mushrooms: Use a brush to gently remove any dirt or debris. Avoid washing the mushrooms with water as this can make them soggy and more prone to freezer burn.
- Trim the stems: Cut off the ends of the stems to ensure a neat and even shape.
- Slice or chop the mushrooms: Cut the mushrooms into thin slices or bite-sized chunks. Aim for pieces that are no more than 1/2-inch thick. You can always chop them smaller when you are ready to use them.
- Freeze the mushroom pieces in a single layer: Spread the mushroom pieces on a baking sheet, cookie sheet, or large plate. It is okay if the pieces touch, but ensure they do not overlap. Freeze for about 1-2 hours or until completely frozen.
- Transfer to a freezer bag or container: Once frozen, transfer the mushroom pieces to a freezer bag or airtight container. Squeeze out as much air as possible from the bag before sealing. Alternatively, you can use a vacuum sealer to prolong freshness and prevent freezer burn.
- Label and store: Label the bag or container with the date and store it in the freezer.
When you are ready to use the frozen porcini mushrooms, simply add them directly to your recipe without thawing. They will cook in the same amount of time as fresh mushrooms and can be used in soups, stews, risottos, pasta, and more.
It is important to note that freezing may affect the quality, texture, and flavour of the mushrooms. Some sources suggest that cooking or blanching the mushrooms before freezing can help preserve their qualities, but this may vary depending on the type of mushroom.
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Storing frozen porcini mushrooms
Before storing porcini mushrooms in the freezer, they must be cleaned and washed. To do this, gently remove any forest debris, such as twigs, earth, and leaves, with your hands or a soft brush. Cut a thin layer from the bottom of the stem, where any remaining dirt may be, and remove any wormholes, scratches, or dark spots. Rinse the mushrooms under running water, taking care not to soak or break them.
After cleaning and rinsing, the mushrooms can be frozen raw or cooked. If you choose to freeze them raw, pat them dry and place them in a single layer on a tray. Put the tray in the freezer for several hours until the mushrooms are frozen solid. Then, transfer the frozen mushrooms to airtight containers or freezer bags. It is important to remove as much air as possible from the bags before sealing and returning them to the freezer. This method is called IQF (individually quick frozen) and is popular for freezing mushrooms raw.
Alternatively, you can cook the mushrooms before freezing. This can be done by boiling, steaming, roasting, or frying them. Boiling is a popular choice, as it helps remove any harmful substances the mushrooms may have absorbed from the environment. To boil porcini mushrooms, cut them into slices or cubes and place them in a colander or sieve. Set the colander in a pan with a small amount of water and cover with a lid. Bring the water to a boil and steam the mushrooms for 4-6 minutes, or 7-9 minutes for whole mushrooms. Allow the mushrooms to cool, then transfer them to airtight containers or freezer bags and store them in the freezer.
It is important to note that frozen porcini mushrooms should not be refrozen after thawing, as this can lead to food poisoning. Additionally, frozen mushrooms should be used within about one year for best quality and nutritional value.
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Defrosting frozen porcini mushrooms
Frozen porcini mushrooms can be cooked without defrosting, which helps to prevent sogginess. They can be added directly to a dish and cooked in the same way as fresh mushrooms. However, if you want to defrost frozen porcini mushrooms, it is recommended to do so in the fridge, as this will allow you to preserve their taste, colour, smell, and nutritional value. During the defrosting process, liquid may come off the mushrooms, which is normal. After they have defrosted, they can be sliced and cooked as desired.
It is important to note that frozen mushrooms should not be refrozen after thawing, as this can lead to potential food poisoning. Additionally, frozen porcini mushrooms are best used within a year, as they may develop an unattractive colour and taste terrible if frozen for too long.
To defrost porcini mushrooms, place them in the refrigerator and allow them to thaw gradually. This method helps to preserve the quality of the mushrooms and prevents them from becoming soggy. Once they are partially defrosted, you can slice them and proceed with your recipe.
Alternatively, if you are in a hurry, you can defrost the mushrooms by placing them in a microwave-safe dish and using the defrost setting on your microwave. This method will speed up the defrosting process, but it may not yield the same quality as gradual thawing in the refrigerator.
Once the mushrooms are defrosted, it is important to cook them thoroughly before consuming them. They can be used in a variety of dishes, such as risottos, pasta, sauces, soups, and stews.
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Frequently asked questions
Clean the mushrooms with a soft brush or a washcloth to remove any forest debris. Cut off the bottom of the stem and remove any wormholes, scratches and dark spots. Rinse the mushrooms in water acidified with vinegar or lemon juice to avoid discolouration.
Large mushrooms should be cut into thin slices or diced. Young mushrooms can be frozen whole. Place the mushrooms in a single layer on a tray and put them in the freezer for several hours. Once frozen, transfer the mushrooms into plastic bags, squeeze out the air and store them in the freezer.
Yes. You can boil or fry the mushrooms before freezing. Boil the mushrooms in water without salt to preserve their juiciness. You can also fry them in a pan without oil, salt or spices. Once cooled, store the mushrooms in plastic containers or bags suitable for freezing.
Freezing is a good way to preserve the natural taste and nutrients of porcini mushrooms. Frozen mushrooms can be stored for up to a year.

























