How to Make the Perfect Grilled Portobello Mushroom Burgers
American · Easy · 32 min · 4 servings
These grilled portobello mushroom burgers are marinated in a savory balsamic glaze and grilled until tender and juicy, making them a satisfying meat-free alternative that even non-vegetarians will enjoy. Topped with melted provolone and roasted red peppers, they deliver bold umami flavor in every bite.
Why this recipe works
This Grilled Portobello Mushroom Burgers recipe has been crafted to deliver restaurant-quality results in your home kitchen. At just 32 minutes from start to finish, it fits perfectly into a busy schedule without sacrificing flavor. Each serving comes in at 280 calories with 14g of protein, making it a balanced choice for any meal.
What you will need
This recipe uses 6 simple ingredients that you can find at any grocery store:
- 4 large portobello mushroom caps stems removed
- 3 tbsp balsamic vinegar
- 2 tbsp olive oil
- 2 cloves garlic minced
- 4 slices provolone cheese
- 4 whole brioche burger buns toasted
Step by step instructions
Step 1: Marinate the Mushroom Caps
Whisk together balsamic vinegar, olive oil, and minced garlic. Use a spoon to scrape the gills from the inside of each mushroom cap, then place caps gill side up in a shallow dish. Pour the marinade over them and let them sit for 15 minutes, turning once halfway through.
Step 2: Preheat the Grill
Preheat your grill to medium-high heat around 400 degrees Fahrenheit. Clean the grates and brush them with oil to prevent the mushrooms from sticking. Portobello caps are delicate and require well-oiled grates for clean release.
Step 3: Grill the Mushrooms
Place the mushroom caps gill side down on the grill. Cook for 5 to 6 minutes per side until they are deeply caramelized and tender throughout. In the final minute of cooking, place a slice of provolone cheese on each cap and close the lid to melt the cheese completely.
Step 4: Assemble and Serve
Toast the brioche buns on the grill for 1 minute until golden. Place a cheesy portobello cap on each bottom bun and top with your choice of roasted red peppers, arugula, or condiments. Serve immediately while the mushrooms are still hot and juicy.
Easy substitutions
Missing an ingredient? Here are some swaps that work perfectly:
- provolone cheese → fresh mozzarella slices for a creamier melt and milder flavor
- brioche buns → ciabatta rolls for a sturdier base that holds up well to juicy mushrooms
Common mistakes to avoid
Watch out for these pitfalls that can affect your results:
- Skipping the step of removing the gills which retain excess moisture and cause the mushroom to steam rather than grill properly
- Marinating the mushrooms for too long which makes them waterlogged and causes them to fall apart on the grill
Nutrition facts
Per serving: 280 calories, 14g protein, 28g carbs, 14g fat, 4g fiber.
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