Grilled portobello mushrooms are a delicious and hearty option for both vegetarians and meat-lovers alike. These mushrooms soak up the flavors of olive oil, balsamic vinegar, and garlic, making them a savory and satisfying dish. Perfect for a summer barbecue or a cozy indoor grill session, this recipe is simple yet flavorful.
If you don't already have portobello mushrooms in your kitchen, they can be found in the produce section of most supermarkets. Balsamic vinegar is another ingredient that may not be in everyone's pantry; it adds a tangy sweetness to the dish. Make sure to pick up some fresh garlic if you don't have any on hand, as it enhances the overall flavor.

Ingredients for Grilled Portobello Mushrooms Recipe
Portobello mushrooms: Large, meaty mushrooms that serve as the main ingredient. They have a rich, earthy flavor and a dense texture.
Olive oil: Used to coat the mushrooms, adding moisture and a subtle fruity flavor.
Balsamic vinegar: Adds a tangy and slightly sweet flavor that complements the earthiness of the mushrooms.
Garlic: Freshly minced garlic adds a robust and aromatic flavor to the dish.
Dried thyme: Provides a hint of herbal earthiness that pairs well with the mushrooms.
Salt: Enhances the overall flavor of the dish.
Pepper: Adds a touch of heat and depth to the flavor profile.
Technique Tip for This Recipe
When preparing portobello mushrooms for grilling, it's essential to remove the stems to ensure even cooking. Additionally, marinating the mushrooms for at least 15-20 minutes before grilling allows the olive oil, balsamic vinegar, and garlic mixture to penetrate the mushrooms, enhancing their flavor. For an extra touch, you can add a sprinkle of fresh herbs like parsley or basil after grilling to add a burst of freshness.
Suggested Side Dishes
Alternative Ingredients
portobello mushrooms - Substitute with eggplant slices: Eggplant has a similar meaty texture and can absorb marinades well.
portobello mushrooms - Substitute with large button mushrooms: These mushrooms have a similar flavor profile and can be grilled easily.
olive oil - Substitute with avocado oil: Avocado oil has a high smoke point and a neutral flavor, making it a good alternative for grilling.
olive oil - Substitute with grapeseed oil: Grapeseed oil is another neutral oil with a high smoke point, suitable for grilling.
balsamic vinegar - Substitute with red wine vinegar: Red wine vinegar has a similar acidity and can provide a comparable tangy flavor.
balsamic vinegar - Substitute with apple cider vinegar: Apple cider vinegar offers a slightly sweet and tangy flavor that can complement the dish.
minced garlic - Substitute with garlic powder: Garlic powder can provide a similar flavor, though it is less pungent.
minced garlic - Substitute with shallots: Shallots offer a milder, sweeter flavor that can add depth to the dish.
dried thyme - Substitute with dried oregano: Oregano has a similar earthy flavor and can be used in the same quantity.
dried thyme - Substitute with dried rosemary: Rosemary has a robust, piney flavor that can complement grilled dishes well.
salt - Substitute with soy sauce: Soy sauce can add saltiness along with umami depth.
pepper - Substitute with cayenne pepper: Cayenne pepper can add a bit of heat along with the peppery flavor.
Other Alternative Recipes Similar to This
How to Store or Freeze This Dish
Allow the grilled portobello mushrooms to cool completely before storing. This helps prevent condensation, which can make the mushrooms soggy.
Place the cooled mushrooms in an airtight container. If stacking them, separate each layer with parchment paper to avoid sticking.
Store the container in the refrigerator. The grilled portobello mushrooms will stay fresh for up to 3-4 days.
For freezing, lay the cooled mushrooms on a baking sheet in a single layer. Freeze them for about 1-2 hours until they are solid. This prevents them from sticking together.
Once frozen, transfer the mushrooms to a freezer-safe bag or container. Label with the date to keep track of freshness.
When ready to use, thaw the mushrooms in the refrigerator overnight. Reheat them on the grill or in a skillet over medium heat until warmed through.
Avoid microwaving the mushrooms as it can make them rubbery. Instead, opt for reheating methods that maintain their texture and flavor.
How to Reheat Leftovers
Oven Method:
- Preheat your oven to 350°F (175°C).
- Place the grilled portobello mushrooms on a baking sheet.
- Cover them with aluminum foil to retain moisture.
- Heat for about 10-15 minutes, or until warmed through.
Stovetop Method:
- Heat a non-stick skillet over medium heat.
- Add a small amount of olive oil or butter to the pan.
- Place the mushrooms in the skillet and cook for 3-5 minutes on each side, until heated through.
Microwave Method:
- Place the mushrooms on a microwave-safe plate.
- Cover with a microwave-safe lid or another plate to prevent drying out.
- Heat on medium power for 1-2 minutes, checking halfway through to ensure they are evenly heated.
Grill Method:
- Preheat your grill to medium heat.
- Place the mushrooms on the grill for 2-3 minutes on each side, just until they are warmed through.
Air Fryer Method:
- Preheat your air fryer to 350°F (175°C).
- Place the mushrooms in the air fryer basket.
- Heat for 3-5 minutes, checking halfway to ensure they are evenly heated.
Steam Method:
- Set up a steamer basket over boiling water.
- Place the mushrooms in the steamer basket.
- Steam for about 5 minutes, or until they are heated through.
Best Tools for This Recipe
Grill: Used to cook the portobello mushrooms, providing a smoky flavor and char marks.
Small bowl: Used to mix together the olive oil, balsamic vinegar, minced garlic, dried thyme, salt, and pepper.
Brush: Used to apply the olive oil mixture onto both sides of the portobello mushrooms.
Tongs: Used to flip the mushrooms on the grill safely and easily.
Knife: Used to mince the garlic and remove the stems from the portobello mushrooms.
Cutting board: Provides a safe surface for mincing garlic and preparing the mushrooms.
Measuring spoons: Used to measure out the olive oil, balsamic vinegar, and dried thyme accurately.
How to Save Time on This Recipe
Prepare the marinade ahead: Mix the olive oil, balsamic vinegar, minced garlic, and dried thyme the night before to save time.
Preheat the grill: Start preheating your grill while you prepare the mushrooms to cut down on waiting time.
Use a brush: Brushing the marinade onto the portobello mushrooms ensures even coverage and speeds up the process.
Cook in batches: If your grill is small, cook the mushrooms in batches to ensure they cook evenly and quickly.
Serve immediately: Have your sides ready so you can serve the mushrooms hot off the grill.

Grilled Portobello Mushrooms Recipe
Ingredients
Main Ingredients
- 4 Portobello mushrooms stems removed
- 2 tablespoon Olive oil
- 1 tablespoon Balsamic vinegar
- 2 cloves Garlic minced
- 1 teaspoon Dried thyme
- to taste Salt and pepper
Instructions
- 1. Preheat your grill to medium-high heat.
- 2. In a small bowl, mix together olive oil, balsamic vinegar, minced garlic, dried thyme, salt, and pepper.
- 3. Brush the mixture onto both sides of the portobello mushrooms.
- 4. Place the mushrooms on the grill, gill side down, and cook for about 5-7 minutes.
- 5. Flip the mushrooms and cook for another 5-7 minutes, until tender.
- 6. Remove from grill and serve hot.
Nutritional Value
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