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Grilled portobello mushroom on plate with salad.
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5 from 2 votes

Grilled portobello mushrooms

Grilled portobello mushroom caps are a terrific vegetable-forward entree for your cookout. Serve them as a main course, or pop them into a bun as a sandwich.
Prep Time7 mins
Cook Time8 mins
Marinating time30 mins
Total Time45 mins
Course: Main Course
Cuisine: American, Vegan
Keyword: cookout recipe, grill recipe, summer food
Servings: 4 people
Calories: 83kcal
Author: Cadry Nelson



  • Clean portobello mushrooms with a damp cloth. Remove stems using your fingers or a knife.
    If you'd like, use a spoon to remove the dark brown gills from underneath the mushroom. They don't affect the flavor at all, but they do release dark brown liquid while they cook.
  • In a mixing bowl, combine olive oil, red wine vinegar, minced garlic, dried parsley, dried basil, dried oregano, a generous pinch of salt, and a dash of pepper. (For the garlic, I like to use a Microplane zester, so that it's almost paste-like & easy to combine with the other ingredients.)
  • Add the mushroom caps to the mixing bowl. Use your hands to make sure that each cap gets covered front & back with the marinade. If your mushroom caps are especially large, you can add more oil if needed to make sure it's all evenly dispersed.
  • Put the bowl with mushrooms in the refrigerator, and let them soak in the marinade for 30 minutes to an hour. (If your refrigerator isn't large enough to hold a mixing bowl, the mushrooms can go into a freezer bag instead to marinate.)
  • Bring a grill, fire pit with grate, or grill pan to a medium high heat. (For a gas grill, I aim for about 500 degrees.)
  • Put the marinated mushroom caps on the grill, grate, or grill pan. Cook for about 4 minutes on each side & then flip. (Don't flip until the mushrooms have nice grill marks.) Remove from heat & serve.


Calories: 83kcal | Carbohydrates: 4g | Protein: 2g | Fat: 7g | Saturated Fat: 1g | Trans Fat: 1g | Sodium: 8mg | Potassium: 317mg | Fiber: 1g | Sugar: 2g | Vitamin A: 5IU | Vitamin C: 1mg | Calcium: 11mg | Iron: 1mg