
Grilled mushrooms and onions are a delicious and versatile dish that can be served as a side or used as an ingredient in recipes such as tacos, burgers, and pasta. Grilling mushrooms and onions is a straightforward process that can be made even easier by cooking them in a foil pack or skewering them before placing them on the grill. In this article, we will provide a step-by-step guide on how to grill mushrooms and onions, as well as offer tips and suggestions for serving this tasty dish.
How to BBQ Mushrooms and Onions:
| Characteristics | Values |
|---|---|
| Type of Mushrooms | Portobello, Cremini, White, Baby Bella, Oyster, Shiitake, Maitake, Chanterelle, Enoki |
| Type of Onions | Sweet (Yellow or Red) |
| Marinade | Butter, Soy Sauce, Lemon Zest, Lemon Juice, Honey, Pepper, Garlic |
| Seasoning | Salt, Pepper, Steak Seasoning, Garden Vegetable Seasoning, Sea Salt, Black Pepper |
| Other Ingredients | Olive Oil, Vegetable Oil, Balsamic Vinegar, Worcestershire Sauce |
| Cooking Method | Grill, Foil Packet, Skewers |
| Cooking Time | 3-7 minutes per side, or until tender |
| Serving Suggestions | Tacos, Burgers, Burrito Bowl, Pasta, Polenta, Steak, Potatoes |
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What You'll Learn

Preparing mushrooms and onions for grilling
To prepare the mushrooms, start by gently brushing off any dirt with a soft brush or wiping them clean with a damp, lint-free cloth or paper towel. Avoid rinsing the mushrooms under running water, as they can become waterlogged. Then, trim off any dry, woody bits from the mushroom stems and cut the mushrooms lengthwise into thirds. Place the cleaned and sliced mushrooms in a bowl.
For the onions, start by removing the skin and slicing them into quarter-inch-thick slivers. Place the sliced onions in a separate bowl.
Next, you'll want to season your mushrooms and onions. You can use a variety of seasonings, such as salt, pepper, extra-virgin olive oil, balsamic vinegar, and tamari (a type of soy sauce). Mix your desired seasonings with melted butter or olive oil, creating a savoury marinade. Combine the mushrooms and onions with the marinade in a large bowl, tossing to coat them evenly.
Finally, you can thread the mushrooms and onions onto skewers, alternating between the two for a colourful presentation. If using wooden skewers, remember to soak them first to prevent burning.
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Grilling mushrooms and onions in foil
To get started, you'll want to prepare your mushrooms and onions. For this recipe, you can use a variety of mushrooms, such as white, baby bella, portobello, wild, or oyster mushrooms. Wash and slice your mushrooms lengthwise into thirds, and place them in a bowl. For the onions, peel and slice them into quarter-inch-thick slivers. You can use yellow, red, or sweet onions, depending on your preference.
Next, you'll want to season your vegetables. You can use a variety of seasonings, such as salt, pepper, garlic, butter, and your favourite herb mix. One option is to use a blend of garlic, onion, and black pepper, or you could try a combination of thyme, mint, sage, rosemary, or marjoram. Mix your seasonings with butter and add the mushrooms, tossing them to coat evenly.
Now it's time to prepare your foil packet. Cut an 18-inch-wide piece of durable aluminium foil and fold it to create a square. Place your seasoned mushrooms and onions in the centre of the foil. Bring the sides of the foil up and double fold the top and ends to tightly seal the packet. You can prepare this packet up to a day ahead of time and keep it in the refrigerator until you're ready to grill.
When you're ready to cook, preheat your outdoor grill to medium heat. Place your foil packet on the grill and let it cook until the vegetables are tender. This should take around 45 minutes, but you can grill them longer if you like your veggies a bit more charred.
Once they're done to your liking, carefully open the foil packet and serve these tasty mushrooms and onions as a side or topping for your main course. Enjoy!
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Grilling mushrooms and onions on skewers
Preparation
Firstly, gather your ingredients. You will need mushrooms (white button, cremini, or portobello mushrooms are recommended), onions (yellow or red), vegetable oil, butter, and seasonings of your choice.
Wash the mushrooms and cut them lengthwise into thirds. Place the sliced mushrooms in a bowl. Peel the onions and cut them into quarter-inch thick slices. Place the onions in a separate bowl.
Marinating
In a large bowl, whisk together butter, your choice of seasonings (such as soy sauce, lemon zest, lemon juice, honey, pepper, and garlic), and vegetable oil. You can also use olive oil, which adds richness and prevents the mushrooms from drying out. Add the mushrooms and onions to the bowl and toss to coat them evenly in the marinade. Cover the bowl and let the mixture marinate at room temperature for about 30 minutes.
Skewering and Grilling
If you are using wooden skewers, remember to soak them before threading the vegetables. Thread the mushrooms and onions alternately onto the skewers. Place the skewers on a preheated grill, covering them to allow grill marks to form. This should take about 3 minutes on each side.
Turn the skewers occasionally and continue grilling until the mushrooms and onions are well-browned and tender, which should take about 1 to 2 minutes more.
Serving
Remove the skewers from the grill and place them on a serving plate. Brush the vegetables with any remaining butter mixture, and sprinkle with thyme or other herbs of your choice before serving.
Enjoy your grilled mushrooms and onions!
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Sautéing mushrooms and onions
Ingredients
To make sautéed mushrooms and onions, you'll need:
- Mushrooms (white, baby bella, cremini, portobello, or a mix of different types for varied textures and flavors)
- Onion (brown or white)
- Butter or olive oil (or a mix of both)
- Salt and pepper
- Optional: garlic, parsley or other fresh herbs, steak seasoning, Worcestershire sauce, balsamic vinegar, or soy sauce for extra flavor.
Instructions
Here's a step-by-step guide to sautéing mushrooms and onions:
- Slice the onions into strips or chop them into your desired size.
- Heat butter or olive oil in a large skillet over medium to medium-high heat. You can also add a splash of Worcestershire sauce to the oil or melt butter for extra flavor.
- Add the onions to the pan and sauté until they become translucent and lightly browned. This should take around 5 minutes, and you should stir occasionally to prevent burning. Adding a pinch of salt at this stage can help the onions caramelize.
- Slice the mushrooms evenly, including the stems, so they cook uniformly. It's best not to wash the mushrooms with water, as this can make them watery and slimy. Instead, use a damp paper towel to wipe off any dirt.
- Add the mushrooms to the pan and increase the heat to high. Sautéing mushrooms at a higher temperature helps prevent them from becoming watery.
- Cook the mushrooms for 5 to 10 minutes, stirring occasionally, until they are golden brown.
- Once the mushrooms are browned, add an extra teaspoon of olive oil or butter and season with salt and pepper.
- Stir well and continue sautéing for a couple of minutes to incorporate the flavors.
- Finally, remove the mushrooms and onions from the heat and add chopped parsley or other fresh herbs.
Tips
- If you're using garlic, add it after the onions have started to brown and cook it down together before adding the mushrooms.
- For a more well-done dish, you can cook the onions longer, even up to an hour, to get soft, caramelized onions.
- If you're making a larger dish, portobello mushrooms work great in tacos, burgers, or sandwiches.
- To make grilled mushrooms, you can toss them with butter and seasoning, wrap them in foil, and cook them on a grill for a charred exterior and juicy interior.
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Serving suggestions
Grilled mushrooms and onions are a delicious and versatile side dish that can be served in numerous ways. Here are some serving suggestions to get you started:
As a Side Dish
Grilled mushrooms and onions make a fantastic side on their own or with a simple dressing. Drizzle them with balsamic vinegar, olive oil, and tamari, and sprinkle with salt and pepper. You can also serve them with fresh herbs, such as thyme, and a drizzle of balsamic for a fresh and flavourful dish.
With Meat and Poultry
Mushrooms and onions are a perfect pairing for grilled steak, beef tenderloin, or chicken. They can be served as a topping or alongside the meat. For an extra boost of flavour, add some Worcestershire sauce to the mushrooms as you cook them.
In a Hearty Main Course
Grilled mushrooms can be the star of the show in a variety of main courses. Slice up portobello mushrooms and use them in tacos, burrito bowls, or pasta dishes. Portobellos also make a great plant-based burger patty or sandwich filler, especially when paired with avocado sauce, pickled red onions, and mango salsa. For a more substantial side, grilled cremini mushrooms are a tasty option.
With Other Grilled Veggies
Pair your grilled mushrooms and onions with other grilled vegetables, such as peppers, for a colourful and nutritious platter. Serve with a zesty sauce or dressing, such as chimichurri, Greek salad dressing, or cilantro lime dressing.
In a Foil Packet
For an easy and mess-free option, slice your mushrooms and onions, season them, and wrap them in a foil packet before placing them on the grill. This method allows the flavours to meld together and creates a tender, juicy result.
With so many serving suggestions, grilled mushrooms and onions are a versatile and delicious addition to any BBQ or grilled meal!
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Frequently asked questions
First, clean your mushrooms with a damp cloth or paper towel. Then, slice the mushrooms and onions and place them in a bowl with vegetable oil and salt. Start your grill and preheat to 500 degrees. Place the mushrooms and onions on a non-stick pan on the grill and cook for 5 minutes. Turn the mushrooms and onions, and cook for another 5 minutes. Repeat this process until your vegetables are tender.
It takes around 15-20 minutes to BBQ mushrooms and onions.
White or baby bella mushrooms are great options for BBQing. Portobello mushrooms are also a good choice, especially if you're making tacos or burgers.
BBQ mushrooms and onions make a great side dish for grilled steak, chicken, or beef tenderloin. They can also be served on their own as a light meal.

























