
Portobello mushrooms are a versatile ingredient, perfect for grilling, roasting, or adding to sandwiches. Before cooking, it's important to clean them correctly and thoroughly. While some sources advise against washing mushrooms, as they can absorb water and become soggy, this is largely a myth. Mushrooms are already mostly made of water, so a quick rinse won't make a noticeable difference. To clean baby portobello mushrooms, you can use a damp cloth, a soft brush, or simply rinse them under cold running water for 10-20 seconds. If you're using larger mushroom caps, you can also wipe them with a moist sponge, making sure to get the underside of the caps and the stems. Once cleaned, place the mushrooms on a clean dish towel and let them dry completely before storing them in the fridge.
| Characteristics | Values |
|---|---|
| Rinsing with water | Hold baby portabella mushrooms under cold running water for 10-20 seconds. |
| Rinsing with sponge | Soak a sponge in water, squeeze out excess water, then gently wipe the mushroom caps, including the undersides and stems, until no dirt or debris remains. |
| Rinsing with damp paper towel, damp cloth, or mushroom brush | Use a damp paper towel, damp cloth, or mushroom brush to gently wipe any dirt or debris from the baby portabella mushroom. |
| Removing stems | Remove stems with a spoon or a small knife. Stems can be woody and unpleasant to eat. |
| Removing gills | Use a paring knife to slice off the inner edges of the mushroom, exposing the gills. Then, use a spoon to gently scrape away the gills. |
| Drying | Lay mushrooms on a clean dish towel and let them dry completely. |
| Storing | Place dried mushrooms in an open plastic bag in the refrigerator for ventilation. |
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What You'll Learn

Rinsing under cold running water
Rinsing baby portabella mushrooms under cold running water is a quick and easy way to clean them. It is especially useful if you have a lot of small mushrooms to prepare.
To start, place the mushrooms in a colander in your sink. Spray the mushrooms with cold water until any excess debris is gone. You can also simply place the mushrooms under the running tap for 10-20 seconds. Make sure to get the undersides and stems of the mushrooms, as dirt and debris can hide there.
If you are rinsing the mushrooms in a colander, lay them out on clean dish towels and let them dry completely. If you are using a sponge or damp paper towel, be sure to squeeze out as much water as possible before gently wiping the mushrooms. This will prevent too much water from being absorbed by the mushrooms.
It is important to note that mushrooms are mostly water, so a little extra water from rinsing will not significantly affect their flavour or texture. Any extra water will simply cook out.
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Using a damp cloth or sponge
Baby portabella mushrooms, also known as portobello mushrooms, are cultivated mushrooms, which means they are grown in sanitized, composted peat moss. While this moss is safe to eat, it can be unappetizing, so it's a good idea to give your mushrooms a rinse before cooking.
One way to clean baby portabella mushrooms is to use a damp cloth or sponge. Here's a step-by-step guide:
- Fill a cup or bowl with water.
- Soak a clean sponge or cloth in the water, then squeeze out as much water as possible. You can also use a damp paper towel.
- Gently wipe the mushroom caps with the damp sponge or cloth. Be sure to get the underside of the caps and the stems until no dirt or debris remains.
- If you're using a cloth or paper towel, you may need to rinse and wring it out a few times to remove any dirt buildup.
- If your mushrooms are particularly dirty, you can also try using a paring knife to carefully cut around the stems and remove them. Then, use a dessert spoon to gently scrape away any remaining dirt or moss.
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Removing the stems
Baby portabella mushrooms, also known as portobello mushrooms, are cultivated mushrooms and are likely grown in sanitized, composted peat moss. While the moss is safe to consume, it is recommended to give the mushrooms a rinse before cooking.
Portobello mushrooms have large stems that are technically edible but can be woody and fibrous and are usually discarded. To remove the stems, hold the mushroom in the palm of your hand and use a paring knife to cut around the stem slowly. You can also use your fingers to pull out the stems, which should pop right out. The stems can be used for stuffing or broth, or discarded if they are too woody.
If the mushrooms are sliced, they will no longer have stems and will be easier to clean. Place the sliced mushrooms in a colander in the sink and spray them with water until any debris is removed. Lay the mushrooms on a clean dish towel and let them dry completely before cooking.
For whole mushrooms, it is recommended to remove the stems first. Then, place the de-stemmed mushrooms in a colander and spray them with water to remove any excess dirt or debris. You can also fill a large bowl with water and dunk the mushrooms into it, swirling the water with your hands, and then drain them. Lay the mushrooms on a clean dish towel and let them dry completely.
If you do not have a colander, you can use a damp paper towel, a mushroom cleaning brush, or a damp cloth to gently wipe down the mushrooms and remove any dirt or debris. Make sure to clean the underside of the caps and the stems until no dirt or debris remains.
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Scraping away the gills
Portobello mushrooms are cultivated in sanitized, composted peat moss, so what looks like dirt in the packaging is likely not actual dirt. However, it is still important to clean them before cooking. While some sources advise against washing mushrooms, as they can absorb water and become soggy, this is a myth. Mushrooms are mostly made of water, so a quick rinse will not make a noticeable difference.
One way to clean baby portobello mushrooms is to use a damp paper towel, mushroom brush, or cloth to gently wipe away any dirt or debris from the surface. If you are cleaning several small mushrooms, you can rinse them under cold running water for 10-20 seconds. However, if you are cleaning larger mushrooms, it is best to use a moist sponge or damp cloth to clean them individually. Fill a cup with water, soak a clean sponge in it, and squeeze out the excess water. Then, gently wipe the mushroom caps, including the underside of the caps and the stems, until no dirt or debris remains.
To remove the gills of portobello mushrooms, start by de-stemming the mushrooms. You can do this by pulling out the stems with your fingers, or by using a small knife to slice them off. Next, hold the mushroom in the palm of your hand and use a paring knife to slice off the inner edges, slowly rotating the mushroom as you go. This will expose the gills located on the underside. Finally, use a dessert spoon to gently scrape away the gills, being careful not to go too deep into the mushroom's flesh. Continue working around the mushroom until you have removed all of the gills.
While the gills of portobello mushrooms are edible, most people prefer to remove them because their dark brown colour can transfer to your dish and give it an unappetizing appearance.
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Drying with a towel
Drying baby portabella mushrooms with a towel is a simple process. First, you'll need to dampen a paper towel, cloth, or sponge. You can also use a mushroom cleaning brush, but this is optional. Gently wipe the mushrooms with your dampened tool of choice, taking care to remove any dirt or debris. If you're using a sponge or cloth, be sure to squeeze out as much water as possible before wiping.
Once you've removed all the dirt, it's time to dry the mushrooms. Lay them out on a clean dish towel or a double layer of cotton towels and let them air-dry completely. You can also pat them dry gently with a towel, but be careful not to bruise the mushrooms. If you're in a hurry, you can speed up the drying process by using a salad spinner or gently bundling the mushrooms into a thin cotton dish towel and swinging them in a windmill motion.
It's important to note that mushrooms are delicate, so handle them with care. Avoid soaking the mushrooms or using running water, as this can affect their flavour and texture. Also, make sure your tools are gentle on the mushrooms—a soft-bristled brush or sponge is ideal.
Once the mushrooms are completely dry, you can store them in an open plastic bag in the refrigerator. This allows for ventilation, and they should stay fresh for a few days.
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Frequently asked questions
Yes, it is always recommended to clean mushrooms before cooking them.
There are a few ways to clean baby portabella mushrooms. One way is to place the mushrooms in a colander and spray them with water until any excess debris is removed. Then, lay them out on clean dish towels and let them dry completely. Alternatively, you can use a damp cloth or a soft brush to gently wipe away any dirt.
Unopened baby portabella mushrooms can last for about 7-10 days in the fridge. Once the package is opened, they should be consumed within 7 days.

























