How to Grill Portobello Mushrooms


Summer is go-time when it comes to the grill: from fruit and pizza to burgers and ribs, it gets quite the workout this time of year! Maybe you’ve grilled typical vegetables like corn, eggplant and peppers before, but now portobello mushrooms can be added to your fired-up menu, too. Place hearty mushrooms on the grill to give them the perfect smoky char, and then whip up a bright caprese salad — made with cherry tomatoes, mozzarella and basil — to place inside their caps. The textured, colorful dish makes for a beautiful appetizer that’s perfect for an al fresco meal with friends and family.

Caprese Stuffed Grilled Portobello Mushrooms

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Things You’ll Need

  • 6 portobello mushroom caps

  • 1/3 cup balsamic vinegar

  • 2 tablespoons extra virgin olive oil

  • 1 tablespoon minced garlic

  • 1/2 teaspoon kosher salt

  • 1/4 teaspoon black pepper

How to Grill Portobello Mushrooms

Step 1: Prep Mushrooms

Mushrooms should never be submersed in water when cleaning — they’re like sponges and will become soggy. Simply dampen a paper towel and gently wipe off any dirt on the exterior caps of the mushrooms. After, flip the mushroom caps over and remove the stem, leaving the gills intact.

Marinade for grilled portobello mushrooms

Step 2: Make the Marinade

While you can certainly grill the portobellos plain, this simple balsamic-based marinade gives them a ton of flavor for relatively little work. Whisk the ingredients together in a small bowl and liberally brush the mixture onto both sides of the mushrooms. Let them sit in the marinade while you preheat the grill.

Marinating portobello mushrooms for the grill

Step 3: Grill the Mushrooms

Heat an outdoor grill or indoor grill pan to medium-high heat, or about 450–500 degrees. Place the mushrooms on the grill with the gill sides down and cook for about 3 to 4 minutes, until grill lines appear around the edges. Flip and cook another 3 to 4 minutes. Brush the mushrooms with any leftover marinade while cooking.


Mushrooms will release a lot of their moisture while cooking. If excess water pools in the caps, pour the water out and continue cooking.

Grilled portobello mushrooms

Step 4: Prepare the Topping

You can definitely eat the grilled mushrooms plain, but what fun would that be? A simple caprese salad is the perfect summer topping.

Things You’ll Need

  • 1 1/4 cups sliced grape or cherry tomatoes

  • 2/3 cup mini mozzarella balls, drained of any excess water

  • 2 tablespoons thinly sliced basil

  • 1 tablespoon extra virgin olive oil

  • Salt and pepper, to taste

Caprese topping for grilled portobello mushrooms

Step 5: Toss the Caprese Salad and Fill the Mushrooms

Combine all the caprese salad ingredients in a bowl and toss to combine. Spoon into the grilled portobello mushrooms and serve.

Caprese salad stuffed grilled portobello mushrooms

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