Even your most meat-loving friends won’t miss the steak when you serve up these grilled Portobello Mushrooms!

I’m not a vegetarian, but I am on a journey to reduce my meat intake, both for the planet and my health. It’s no secret that we eat way too much meat, and I think we’d do ourselves a favor to curb this with vegetarian options that are just as good, or at the very least, come pretty dang close!
Enter: the portobello mushroom. Its robust texture and meaty flavor gives me that chewy and rich bite I crave with my dinner, and they’re less expensive than meat, too.
Not only does the grill impart the most amazing smokiness to anything it touches, but grilling these portobello mushrooms brings out their earthiness. Meanwhile, the trio of balsamic vinegar, Italian seasoning, and garlic creates a marinade that enhances the mushroom’s natural umami flavor. Whether you’re like me and looking for delicious meat-free alternatives or are simply in the mood to try something new, these mushrooms are guaranteed to hit the spot.
Are These Portobello Mushrooms Healthy?
This fantastic fungus is filled with nutrients like B vitamins, phosphorus, selenium, copper, and potassium. They’re also low in calories and fat, making them a healthy addition to your diet.
Thanks to the addition of plant-based Parmesan, these mushrooms are also suitable for vegans. To make this recipe healthier, serve the mushrooms with a side of sautéed greens and garnish them with your favorite nutrient-packed fresh herbs like parsley, basil, or cilantro.

Your New Favorite Burger Filling!
Have you ever tried replacing the meat in your burger with these grilled portobello mushrooms? If not, you’re seriously missing out!
Grilled portobello mushrooms are an excellent meat replacement for burgers due to their umami-rich flavor and meaty texture. The marinade also enhances their savoriness, making them a satisfying alternative to traditional beef patties. When cooked properly, the mushrooms retain a juicy yet slightly firm consistency, giving a similar bite to a well-cooked burger patty.
For toppings, opt for classic options like melted dairy-free cheese, caramelized onions, and roasted red peppers. Adding fresh elements like arugula or spinach and a slice of tomato or avocado can also brighten the burger’s flavors. For sauces, a vegan pesto or garlic aioli slathered on a toasted brioche bun would be a match made in vegan heaven!

How Do I Store Leftovers?
Store leftover mushrooms in an airtight container in the refrigerator for up to 3 days. To freeze, place the cooled mushrooms on a parchment-lined baking sheet and freeze individually until solid. Then, transfer them to a freezer-safe bag or container, removing as much air as possible. Frozen mushrooms can last up to 2 months. Thaw in the fridge overnight before reheating in a skillet or on a grill.

Serving Suggestions
Keep the summer vibes going and grill your whole meal outdoors! I love to serve these mushrooms alongside Grilled Zucchini and Grilled Broccoli for some extra green on my plate, and Grilled Sweet Potatoes are the perfect carb for any summertime meal. If you choose to eat meat, I also recommend throwing these Chicken Breasts on the grill, or a Pork Tenderloin. For a side of freshness that isn’t grilled, I love to make this Cucumber-Avocado Salad.

Recipe
Ingredients
- 4 portobello mushroom caps
- 1/3 cup olive oil
- 3 tablespoons balsamic vinegar
- 1 teaspoon black pepper
- 1 teaspoon salt
- 2 teaspoons Italian seasoning
- 2 cloves garlic minced
- 2 ounces dairy-free Parmesan cheese shredded, optional
Instructions
- Clean the mushrooms by washing them under water and patting them dry with paper towels. Gently trim the stems (optional).
- Create the marinade by whisking together olive oil, balsamic vinegar, black pepper, salt, Italian seasoning, and minced garlic. Place the mushrooms in a resealable bag, pour in the marinade, and refrigerate for 30 to 40 minutes, ensuring not to over-marinate.
- Preheat the grill to 450°F, or high heat.
- Grill the marinated mushrooms, cap-side down, for 4 to 5 minutes, then flip and continue grilling for another 4 to 5 minutes or until they develop deep grill marks and a darker color. They should feel softer when they're ready.
- Serve the grilled mushrooms hot off the grill, optionally topped with shredded Parmesan cheese for a flavor boost.
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