
Portobello mushrooms are a versatile ingredient, perfect for grilling, sautéing, or baking. Before cooking, it's important to clean them properly. While some people advise against washing mushrooms, as they believe it makes them soggy, this is a myth. Mushrooms are already mostly made of water, so a quick rinse won't make a noticeable difference. To clean Portobello mushrooms, you can place them in a colander and spray them with water until any debris is gone. Then, lay them out on a clean dish towel to dry completely. Alternatively, you can use a damp sponge or cloth to gently wipe each mushroom, ensuring you get the underside of the caps and stems. If you plan to remove the stems, which can be woody and fibrous, you can do so by slowly and gently prying them off. The gills are also edible but may add an unpleasant colour or bitter flavour to your dish, so most people prefer to remove them by gently scraping them away with a spoon.
| Characteristics | Values |
|---|---|
| Time taken | 10-20 seconds |
| Method | Rinse under cold running water |
| Tools | Cup, clean sponge, paper towel, mushroom cleaning brush, damp cloth, paring knife, dessert spoon |
| Process | Soak the sponge in water, squeeze out excess water, gently wipe the mushroom caps, including the underside of the caps and stems, until no dirt or debris remains |
| Stems | Remove the stems, which can be woody and unpleasant to eat, using a spoon or a small knife |
| Gills | Remove the gills using a dessert spoon to gently scrape them away. The gills are edible but may add a bitter, unpleasant flavor and may discolour the dish |
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What You'll Learn

Removing the stems
Portobello mushrooms are cultivated in sanitized, composted peat moss, so the dirt you see on them is likely not actual dirt. While the moss is safe to eat, it can be unappetizing, so it's a good idea to clean your portobello mushrooms before cooking.
Portobello stems are tough and fibrous and are usually discarded. They can be removed by pinching the stem very firmly at the base where it meets the cap and slowly and gently prying it off. You can also use a small knife to cut the stem off, being careful to remove as little of the inner cap as possible. The stems can be discarded or used to flavor stock.
If you are cleaning whole portobello mushrooms, it is recommended to remove the stems before cleaning the caps. Place the de-stemmed mushrooms in a colander in your sink and spray them with water until any excess debris is gone. Then, lay them out on clean dish towels and let them dry completely.
If you are cleaning sliced portobello mushrooms, which have no stems, simply place them in a colander and spray them with water to remove any debris. Lay them out on clean dish towels to dry completely.
In addition to rinsing portobello mushrooms with water, you can also use a damp sponge, damp paper towel, damp cloth, or mushroom cleaning brush to clean the caps and remove any dirt or debris.
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Rinsing under cold water
Rinsing portobello mushrooms under cold running water is a quick and easy way to clean them. Place the mushrooms in a colander in your sink and spray them with water until any excess debris is gone. If you have many small, round mushrooms to prepare, rinsing them under cold water is the best way to clean them.
When rinsing portobello mushrooms, it is important to ensure that they are thoroughly dried before cooking. Lay them out on clean dish towels and let them dry completely. Alternatively, you can use a salad spinner to carefully spin them dry.
While some people believe that washing mushrooms is not a good idea, as they may absorb too much water and become soggy or difficult to cook, this is not necessarily the case. Mushrooms will absorb a small amount of moisture when washed (around 1-2% by weight), but it is not enough to significantly impact the cooking process.
If you prefer not to rinse your portobello mushrooms, you can use a damp paper towel, mushroom cleaning brush, or a damp cloth to wipe them clean. However, rinsing under cold water is an effective and convenient method to ensure your mushrooms are clean and ready for cooking.
Remember to clean your portobello mushrooms just before you plan to cook them, as they spoil relatively quickly and should be cooked within four to seven days of purchasing.
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Using a brush
Portobello mushrooms are a cultivated variety of mushroom, and while the moss they are grown in is safe to consume, it can be disconcerting. Therefore, it is a good idea to give them a rinse before cooking.
One way to clean portobello mushrooms is by using a brush. Firstly, remove the stems, which can be woody and fibrous, and are usually discarded. You can use a spoon or a small knife to help with this process. Then, take a mushroom cleaning brush and gently brush the mushroom caps, ensuring you get the underside of the caps and stems until no dirt or debris remains. You can also use a damp cloth, sponge, or paper towel to wipe the mushrooms clean.
If you are cleaning sliced portobello mushrooms, place them in a colander in the sink and spray them with water until the debris is gone. Then, lay them out on clean dish towels and let them dry completely.
It is important to note that portobello mushrooms spoil relatively quickly, so it is best to cook them soon after purchasing, ideally within four to seven days.
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Scraping out the gills
To remove the gills, start by gently twisting off or cutting off the stem of the mushroom. Pulling out the stem should pull out some of the gills as well. Next, hold the mushroom in the palm of your hand with the underside facing up. Use a small spoon to gently scrape out the gills, prying them off in chunks. Make sure you get under the gills to remove the entire structure, not just the brown outer layer. Once you've removed all the gills, you can rinse the mushroom or wipe it out with a damp paper towel to get rid of any residual bits.
If you're making grilled portobello burgers or other unstuffed mushroom recipes, you might want to leave the gills in for a richer flavour. The gills are edible and have a savoury flavour. However, if you're planning to stuff the mushrooms, the gills will be in the way and should be removed.
Now you know how to scrape out the gills of portobello mushrooms! This extra step can help ensure that your mushrooms look and taste great in your dishes.
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Drying with a towel
Portobello mushrooms are a versatile ingredient that can be roasted, grilled, or sautéed. Before cooking, it is important to clean them thoroughly. Here is a detailed, step-by-step guide on drying Portobello mushrooms with a towel:
Firstly, it is recommended to remove the stems of the mushrooms, which can be woody, fibrous, and unpleasant to eat. To do this, hold the mushroom in your palm and use your fingers to snap off the stem. Alternatively, you may need to use a small knife to cut it off, especially if the mushroom is large.
Next, you can clean the mushroom caps. Fill a small bowl with water and soak a clean kitchen towel in it. Squeeze out as much water as possible from the towel. Gently wipe down each mushroom cap with the damp towel, ensuring you clean the underside of the caps and stems until no dirt or debris remains.
After wiping down the mushrooms, use a paring knife to gently scrape out the gills located on the underside of the mushroom caps. The gills can sometimes have a bitter taste, so it is recommended to remove them before cooking.
Once you have cleaned and prepared the mushrooms, lay them out on a clean dish towel and let them air dry completely. It is important to ensure the mushrooms are completely dry before storing or cooking them.
Some people prefer to rinse the mushrooms under cold water before drying with a towel. However, others suggest that mushrooms will absorb water and become difficult to cook. Ultimately, the decision to rinse or not is a matter of personal preference.
Now you know how to effectively clean and dry Portobello mushrooms with a towel, you can prepare them for your favourite recipes!
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Frequently asked questions
Rinse the mushrooms under cold running water for 10-20 seconds. If you don't want to use water, wipe the mushrooms with a damp cloth, sponge, or paper towel.
Yes, the stems can be woody and fibrous, so they are usually discarded. To remove them, pinch the stem at the base and slowly pry it off. You can also use a small knife to cut them off.
The gills are edible but have a bitter flavor and can turn your food a murky brown. To remove them, use a spoon or a knife to gently scrape them away. Be careful not to go too deep into the mushroom's flesh.
Place the cleaned mushrooms on a clean dish towel and let them dry completely. Once dry, put them in an open plastic bag in the refrigerator. They will stay fresh for a few days.
No, the cleaning process is the same. However, sliced mushrooms don't have stems, so they are even easier to clean. Just rinse them in a colander and let them dry before storing.









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