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The Best Grilled Portobello Mushroom Burger

The Best Grilled Portobello Mushroom Burger

The Best Grilled Portobello Mushroom Burger is a delightful culinary creation that brings together the earthy flavors of marinated, grilled portobello mushrooms and the creamy richness of melted Swiss cheese. This burger is a hit among both vegetarians and meat lovers, offering a satisfying, hearty texture that’s perfect for summer barbecues or quick weeknight dinners. Topped with fresh vegetables like tomatoes, spinach, and creamy avocado, this recipe elevates the classic burger experience while keeping it healthy and delicious.

  • Total Time: 40 minutes
  • Yield: Serves 4

Ingredients

Scale
  • 4 portobello mushroom caps
  • 2 tbsp balsamic vinegar
  • 1 tbsp low sodium soy sauce
  • 1 tbsp olive oil
  • 1 tbsp chopped rosemary
  • 1.5 tsp steak seasoning (e.g., Montreal Steak Grill Mates)
  • 4 oz reduced fat Swiss cheese (sliced thin)
  • 4 thick slices red onion
  • 4 thin slices tomato
  • 1/2 avocado (sliced thin)
  • baby spinach
  • 4 whole wheat low-calorie buns

Instructions

  1. In a large bowl, whisk balsamic vinegar, soy sauce, olive oil, rosemary, and steak seasoning.
  2. Add portobello caps to the marinade and toss gently to coat. Let sit for 20-30 minutes.
  3. Preheat your grill or indoor grill pan over medium heat and brush with oil.
  4. Grill marinated mushrooms for 5-7 minutes per side while basting with reserved marinade.
  5. During the last minute of grilling, place Swiss cheese on top of each mushroom cap to melt.
  6. Grill sliced red onion for about one minute per side until charred; toast buns at the same time.
  7. Assemble by layering spinach on each bun followed by the mushroom cap, onions, tomatoes, and avocado.
  • Author: Emmeline
  • Prep Time: 30 minutes
  • Cook Time: 10 minutes
  • Category: Main
  • Method: Grilling
  • Cuisine: American

Nutrition

  • Serving Size: 1 serving
  • Calories: 320
  • Sugar: 3g
  • Sodium: 720mg
  • Fat: 12g
  • Saturated Fat: 4g
  • Unsaturated Fat: 7g
  • Trans Fat: 0g
  • Carbohydrates: 38g
  • Fiber: 8g
  • Protein: 15g
  • Cholesterol: 15mg

Keywords: Feel free to customize your toppings with options like spicy aioli or sautéed mushrooms. Always preheat your grill to ensure the mushrooms achieve a nice char.

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