
Portobello mushrooms are a versatile ingredient that can be used in a variety of dishes, from salads to sandwiches and pizzas. They are also a great meat alternative and can be used in classic meat-based dishes like fajitas, tacos, and lasagna. Portobello mushrooms have a meaty texture and are packed with delicious umami flavour. When preparing Portobello mushrooms, it is important to first clean them by wiping them with a damp paper towel or sponge to remove any dirt. You can also choose to remove the gills and stems for a smoother texture and to avoid the juices from turning black. Portobello mushrooms can be baked, roasted, grilled, or marinated and are often sliced and added to dishes or used as a burger or sandwich filling.
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What You'll Learn

Cleaning and preparing the mushrooms
Portobello mushrooms are a versatile ingredient that can be used in a variety of dishes. Before cooking, it is important to clean and prepare them properly. Here is a step-by-step guide to cleaning and preparing portobello mushrooms:
Cleaning the Mushrooms
Firstly, fill a small bowl with water. Wet a clean kitchen sponge or a damp paper towel in the bowl and gently wipe the mushroom caps to remove any dirt and debris. If using a paper towel, make sure to wipe the mushrooms gently to avoid breaking them. It is important not to soak the mushrooms as they can become mushy. If any parts of the skin are particularly damaged, you can carefully peel back that section.
Removing the Stems and Gills
Turn the mushrooms upside down and place one in the palm of your hand. Using a paring knife, carefully slice off the mushroom's inner edges while slowly rotating its cap. Then, use a small spoon to gently scrape and remove the gills. Be careful not to dig too deep into the flesh of the mushroom. If you prefer a smoother texture, you can use a spoon to scrape off the gills during the prep phase.
Choosing the Right Mushrooms
When buying portobello mushrooms, look for large, firm mushrooms with smooth caps. Avoid shrivelled, soft, or tiny mushrooms. The gills should be dry, with a faint pinkish hue when held up to the light. If they are deep dark black or wet-looking, the mushrooms are past their prime.
Storage
Portobello mushrooms can be stored whole in the refrigerator in an open plastic bag to allow for ventilation. They should be mildly damp and springy, not mushy or spongey.
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Marinating the mushrooms
Preparing portobello mushrooms for cooking is a simple process. First, wipe the mushrooms clean with a damp paper towel to remove any dirt and debris. If you need to rinse them, do so quickly and pat them dry immediately. Then, remove the stems and use a spoon to gently scrape out the gills.
When it comes to marinating the mushrooms, you have a variety of options. Here are some detailed instructions to achieve the best results:
- Scoring the Caps: Before marinating, it is recommended to lightly score the top side of the mushroom cap. This technique allows the marinade to penetrate deeper into the mushroom, enhancing its flavour. It also helps to prevent the mushroom from distorting as it cooks.
- Choosing a Marinade: Mushrooms are extremely porous and readily absorb flavours. You can choose from a variety of marinades, such as olive oil, garlic, Parmigiano cheese, parsley, thyme, butter, or soy sauce. Be cautious not to marinate for too long, as mushrooms can absorb more liquid than they can handle, resulting in a spongy texture.
- Time for Marinating: Aim for a minimum of 15 minutes of marination. This allows the mushrooms to absorb the flavours effectively. However, do not exceed 30 minutes, as extended marination may negatively affect the texture.
- Customising the Flavour: Feel free to experiment with different herbs and spices in your marinade to suit your taste preferences. You can add a pinch of cayenne or red pepper flakes for a spicy kick. Additionally, consider using different types of oils, such as avocado oil or vegetable oil, to impart unique flavours.
- Baking or Grilling: After marinating, you can bake or grill the mushrooms. Preheat your oven to the recommended temperature, typically around 400°F (200°C). Place the mushrooms on a baking sheet and bake for approximately 15 minutes, or until tender. If grilling, aim for a similar duration, ensuring the mushrooms are cooked evenly.
- Resting and Serving: Allow the mushrooms to rest for a few minutes after cooking to let the juices redistribute. This prevents the mushrooms from drying out and ensures a juicy, flavourful bite. Serve the mushrooms as a side dish or incorporate them into salads, sandwiches, or other recipes.
Remember, when selecting mushrooms, choose ones with firm caps and stems, avoiding any shrivelled or soft caps. By following these steps and customising your marinade, you'll be able to prepare delicious and flavourful portobello mushrooms.
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Baking the mushrooms
Preparation
Firstly, preheat your oven to 400°F/200°C. Then, wipe the mushrooms clean with a damp paper towel and remove the stems. If you want a smoother texture, you can also use a spoon to scrape the gills off the mushrooms.
Marinade
Prepare a marinade by mixing together oil, garlic, thyme, and a little salt and pepper. You can also add other fresh herbs like parsley and tarragon, or even a glass of white wine. Place the mushrooms in a dish and rub the marinade into them. Leave to soak for 15 minutes.
Baking
Place the mushrooms on a baking sheet, gill-side up, and bake for 10 minutes. Then, flip the mushrooms, discard any liquid, and bake for another 5-7 minutes. The mushrooms are done when they are golden brown on the edges and tender on the inside.
Serving
Let the mushrooms rest for a few minutes before serving. They can be sliced and served as a side dish, or used as a filling for sandwiches, burgers, or tacos. They can also be sliced and added to soups, salads, or breakfast egg dishes.
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Roasting the mushrooms
Roasting Poteella mushrooms is a straightforward process. First, preheat your oven to 400 degrees Fahrenheit (or 200 degrees Celsius). While the oven is heating up, prepare the mushrooms. Wipe the mushrooms clean with a damp paper towel to remove any dirt and debris, or use a clean kitchen sponge to gently wipe the mushroom caps. You can also remove the stems and gills with a small spoon, but this is optional and depends on your texture preference. Be careful not to dig too deep into the flesh of the mushroom.
Next, brush or rub the mushrooms with oil. You can use olive oil, avocado oil, vegetable oil, or any oil of your choice. Season the mushrooms with salt and pepper, or any other spices you prefer. If you want to add more flavour, you can marinate the mushrooms before roasting. A simple marinade can be made by mixing olive oil, garlic, Parmesan cheese, and parsley. Let the mushrooms soak in this mixture for about 15 to 30 minutes before roasting.
Now, it's time to roast the mushrooms. Place the mushrooms on a baking sheet, gill-side up, and put them in the oven. Roast until they are tender and starting to brown. Then, flip the mushrooms over and continue roasting for another 5 minutes or so. Keep an eye on them to ensure they don't burn.
Once they're done, remove the mushrooms from the oven and let them rest for a few minutes before serving. Roasted Poteella mushrooms can be served as a side dish or used in various recipes, such as salads, sandwiches, or as a meat alternative in dishes like fajitas, tacos, or lasagna.
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Serving suggestions
Portobello mushrooms are a great addition to many dishes, whether served as a side or incorporated into a main.
As a Side
Portobello mushrooms can be served as a side dish to accompany a variety of meals. For example, they can be roasted and seasoned with salt and pepper, and served alongside grilled meats such as steak, chicken, or pork chops. They can also be sliced and added to a salad, or used as a topping for pizza.
Incorporated into a Main
Portobello mushrooms can be incorporated into a main dish in a variety of ways. They can be used as a "'meat'" substitute in dishes such as fajitas, tacos, burgers, or lasagna. They can also be stuffed with a variety of fillings, such as spinach and goat cheese, or used as a filling for sandwiches or wraps.
On Their Own
Portobello mushrooms can also be served on their own as a main dish. They can be baked or roasted with various seasonings and toppings, such as cheese, garlic, and herbs. They can also be marinated before cooking to add extra flavour.
With Other Sides
Portobello mushrooms can be served with a variety of other side dishes, such as mashed potatoes, roasted vegetables, or a simple green salad. They can also be served with low-carb options, such as broccoli salad or mashed cauliflower.
As an Appetizer
Portobello mushrooms can be sliced and served as an antipasto with grilled bread, or used as an ingredient in appetizers such as teriyaki noodles or tzatziki with pita bread.
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Frequently asked questions
Always buy fresh mushrooms from the loose mushroom bin. Check for a firm cap and stem, and avoid shrivelled or soft caps. Flip the mushroom over and check the gill structure—it should be dry, with a faint pinkish hue.
Wipe the mushrooms with a damp paper towel to clean them. If you need to rinse them, do it quickly and pat them dry immediately. Remove the stems and use a spoon to gently scrape out the gills.
Mushrooms are porous and will absorb liquid quickly. Marinate for a maximum of 30 minutes before grilling or roasting.






















