Grilled Portobello Mushroom Burger Recipe

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Cindy Gordon Modified: March 25, 2022
Grilled Portobello Mushroom Burger Recipe

How To Make Grilled Portobello Mushroom Burger

You will love this tasty and meatless mushroom burger made with grilled marinated mushrooms topped with melted Swiss cheese, spinach, tomatoes, and avocado.

Preparation: 30 minutes
Cooking: 30 minutes
Total: 1 hour



  • 4portobello mushroom caps
  • 2tbspbalsamic vinegar
  • 1tbspsoy sauce,low sodium
  • 1tbspolive oil
  • 1tbsprosemary,chopped
  • 1tspsteak seasoning,like Montreal Steak Grill Mates
  • 4red onion slices,thick
  • 4ozreduced-fat Swiss,sliced thin, Alpine lace
  • 4tomato slices,thin
  • ½avocado,sliced thin
  • baby spinach
  • 4whole wheat low calorie buns


  1. In a large bowl, whisk together vinegar, soy sauce, oil, rosemary, and Montreal steak seasoning.

  2. Place the mushroom caps in the bowl and toss with a sauce using a spoon to evenly coat. Let stand at room temperature for 20 to 30 minutes, turning a few times.

  3. Heat the grill or indoor grill pan over medium heat. When hot, brush the grate with oil or lightly spray the grill pan.

  4. Place the mushrooms on the grill, reserving marinade for basting. Grill for 5 to 7 minutes on each side or until tender, brushing with marinade frequently.

  5. Top the mushrooms with cheese during the last minute of cooking.

  6. While the mushrooms cook, grill the onions for about 1 minute on each side and grill the buns until toasted.

  7. To finish, place the spinach and grilled portobello mushrooms on the buns and top with the grilled onions, sliced tomato, and avocado.


  • Calories: 213.81kcal
  • Fat: 8.83g
  • Saturated Fat: 1.42g
  • Monounsaturated Fat: 5.33g
  • Polyunsaturated Fat: 1.55g
  • Carbohydrates: 28.53g
  • Fiber: 3.51g
  • Sugar: 5.92g
  • Protein: 5.95g
  • Sodium: 436.45mg
  • Calcium: 92.16mg
  • Potassium: 344.28mg
  • Iron: 2.06mg
  • Vitamin A: 14.21µg
  • Vitamin C: 8.72mg
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