
When it comes to preparing mushrooms, there are a few key steps to follow for optimal results. Firstly, it is important to select fresh mushrooms, avoiding any with grey-brown spots on the cap or excessive dryness, mushiness, or discolouration on the stem. While a little dirt on mushrooms is not an issue, cleaning them properly is essential. Rinsing mushrooms under water is generally not recommended as it can make them soggy and challenging to cook with. Instead, gently wipe them with a damp paper towel or use a mushroom brush to remove any dirt. Once cleaned, the next step is to shear or slice the mushrooms. For efficient slicing, start by trimming off the stems to create a flat base, then use a sharp knife to cut the mushrooms into your desired shape. Alternatively, kitchen shears or a mushroom slicer can be used for a quicker and more uniform result.
| Characteristics | Values |
|---|---|
| Mushroom preparation tools | Mushroom slicer, knife, kitchen shears, egg slicer, mandolin |
| How to clean mushrooms | Wash in cold running water, transfer to a salad spinner, spin dry, cook |
| How to store mushrooms | Store in a plastic bag with the top left open or in a perforated plastic container in the vegetable drawer of the refrigerator |
| How long do fresh mushrooms last? | At least 3-5 days under optimal conditions |
| How to slice mushrooms | First, trim off the stem to create a flat base for the mushroom to rest on, making slicing easier and safer |
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What You'll Learn

Use a knife to slice mushrooms
Using a knife to slice mushrooms is a straightforward process, but it's important to follow certain steps to ensure safety and efficiency. Here's a detailed guide on how to properly shear mushrooms with a knife:
Firstly, it's crucial to select the right type of knife for the job. A sharp utility knife, such as a Santoku-Style Trimmer, is ideal. Its sharp edge allows for smooth and precise cuts. Alternatively, a chef's knife or a paring knife can also be used. Make sure the knife is suitable for the size of the mushroom to ensure better control while slicing.
Before slicing, it's important to prepare your workstation. Get a clean cutting board and lay out your knife. Clean the mushrooms by using a damp paper towel to wipe away any dirt or growing compound. Avoid submerging them in water, as mushrooms are porous and can absorb moisture, which may affect their texture during cooking. If you prefer, you can rinse them under running water and then use a salad spinner to remove excess moisture.
Now, it's time to start slicing. Most mushroom stems are woody and not meant for consumption. Use your knife to trim off the stems by slicing at the cap, creating a flat surface. This step also removes any dried-out or dirty sections. With the stem removed, place the mushroom on the cutting board with the flat side down. Use the knuckles of your non-dominant hand to hold the mushroom securely, being careful to keep your fingers away from the blade.
Slowly and carefully, begin slicing the mushroom caps to your desired thickness. Move your knuckles away from the blade as you cut to maintain safety. If you're a beginner, take your time and pay close attention to the placement of the knife and your hand. Always use sharp knives, as they provide better control and precision when slicing through the spongy flesh of the mushrooms.
With these steps, you'll be able to properly shear mushrooms with a knife, resulting in evenly sliced mushrooms that are perfect for cooking or adding to various dishes. Remember to work slowly and carefully, especially if you're new to using knives in the kitchen.
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Trim the stems first
When preparing mushrooms, the first step is to trim the stems. This is important for several reasons. Firstly, it helps to remove any woody, dried-out, or dirty sections of the mushroom, ensuring that you are only working with the freshest parts. Trimming the stem also creates a flat base for the mushroom, making it much easier and safer to slice. This technique works well with button mushrooms, cremini, and portobello mushrooms, as they are all the same type of mushroom (Agaricus bisporus) with only minor variations in cap colour and age.
When shopping for mushrooms, it is important to select ones that do not have any grey-brown spots on their caps, as this can indicate decay. The bottom of the stem may be slightly discoloured, but it should not be overly dry, mushy, or starting to fall apart. While a little dirt on the cap or clustered near the stem is not an issue, it is important to examine the moist area near the gills under the cap, as this can often be an early sign of decay.
To store mushrooms, place them in a plastic bag with the top left open or in a perforated plastic container in the vegetable drawer of your refrigerator. Fresh mushrooms should last for at least three to five days under optimal conditions. While some sources advise against rinsing mushrooms under water as they can absorb liquid and become difficult to cook, others recommend washing them in cold running water and spinning them dry in a salad spinner before cooking as usual.
When it comes to tools, a knife is typically the most common choice for slicing mushrooms. However, for woodier stems, kitchen shears can be useful. Additionally, a mushroom slicer, similar to an egg slicer but with a dimple for the stem, can be handy for quickly and evenly slicing mushrooms.
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Use a mushroom slicer
Using a mushroom slicer is a quick and easy way to slice mushrooms. This method works best for button mushrooms. To start, you'll want to clean the mushrooms properly. Use a damp paper towel to gently brush away any dirt or debris. Avoid submerging the mushrooms in water, as they are porous and will absorb moisture, affecting their texture when cooked.
Once your mushrooms are clean, you can begin using the mushroom slicer. Place the mushroom on a cutting board, stem side down. If the mushroom has a particularly woody or dried-out stem, you may want to trim it off with a knife before slicing. Press down on the mushroom slicer firmly and quickly to ensure it slices through the mushroom without crushing it.
For thicker mushrooms, you may need to apply more pressure. It is important to use fresh mushrooms with this method, as older mushrooms may be too leathery and put your slicer at risk of breaking. You can also use a similar tool, an egg slicer, to slice your mushrooms. Simply place the mushroom on the slicer and press down to cut through it.
Using a mushroom or egg slicer is a convenient way to quickly and evenly slice mushrooms, especially if you are preparing a large quantity. However, some people may find that these tools are not worth the effort to get them out and clean them, especially for smaller quantities. Ultimately, the decision to use a mushroom slicer comes down to personal preference and the specific needs of your recipe.
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Wash mushrooms in cold water
There are a few different methods for washing mushrooms in cold water, and the right one for you will depend on the type of mushroom you have and how they have been sourced.
One method is to fill a large bowl with cold water, adding a few mushrooms at a time. Swirl the mushrooms in the water for around 10 seconds to loosen any dirt, then remove them to a clean, lint-free towel, patting them dry. Lay them out with the caps up and leave them to air-dry before washing the next batch. Check for any remaining dirt and use a damp paper towel to wipe it off if necessary.
Another method is to place the mushrooms in a colander and give them a quick rinse with cold water, shaking off any excess water. Dry them as much as possible with a paper towel or clean kitchen towel.
A third option is to dunk the mushrooms in a bowl of cold water, swirling the water with your hands before draining them. Lay the mushrooms on a double layer of cotton dish towels and pat them dry.
If you are washing foraged mushrooms, it is recommended to add salt to the water to evict any tiny creatures that may be living inside. Allow the salt to dissolve, then soak the mushrooms for 20 minutes before draining and repeating the process.
It is important to note that mushrooms absorb water easily, so it is best to wash them just before cooking and avoid letting them soak for too long.
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Store fresh mushrooms in a plastic bag in the fridge
Storing fresh mushrooms in a plastic bag in the fridge is not recommended, as plastic containers can trap moisture and speed up spoilage. Mushrooms are delicate and perishable, with a very high moisture content, so they need to be kept dry and well-ventilated to stay firm and fresh.
If you are planning to eat your mushrooms within a day or two of purchasing them, it is fine to keep them in their original packaging. However, if you want them to last longer, it is best to transfer them to a paper bag or a paper towel-lined zip-top plastic bag. Paper bags absorb moisture, keeping your mushrooms fresh, and the paper towels will help to absorb any excess moisture.
Make sure to store your mushrooms on a shelf in the fridge, rather than in the crisper drawer, as this tends to be the most humid part of the fridge. Additionally, avoid placing mushrooms near strong-smelling food, as they will absorb those odors.
If you have a large number of mushrooms and want to keep them for longer, you can also consider dehydrating or freezing them.
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Frequently asked questions
The first step to shearing mushrooms is to trim off the stems. This removes any woody, dried out, or dirty sections and creates a flat base for the mushroom to rest on, making slicing easier and safer.
The best way to clean mushrooms is to wash them in cold running water, transfer them to a salad spinner, and spin them dry. Then, cook them as you normally would, adding a few extra seconds to get rid of the excess moisture.
When shopping for mushrooms, look for ones that don't have any grayish-brown spots on their caps, which can mark decay. The bottom of the stem can be a little discolored, but it should not be overly dry, mushy, or starting to shred apart.
The best tool to use for shearing mushrooms is a kitchen knife. While there are other tools on the market, such as a mushroom slicer, a knife produces the same result and saves time since you don't have to wash a more complicated piece of equipment.
The shape you cut the mushrooms into depends on how you plan to use them. If you want a quick-cooking shape that will brown relatively fast and work well in sauces or soups, sliced mushrooms are best. Quartered mushrooms are great for tossing with olive oil and salt and roasting in the oven. Finely chopped mushrooms are ideal for stuffings, meatballs, or duxelles.

























