The Best Grilled Portobello Mushroom Burger
The Best Grilled Portobello Mushroom Burger is a mouthwatering, vegetarian alternative to traditional beef burgers that everyone can enjoy. Juicy portobello mushrooms are marinated in a flavorful blend of balsamic vinegar, soy sauce, and herbs before being grilled to perfection. Finished with melted Swiss cheese, fresh vegetables like grilled onions and avocado, this burger is a satisfying meal for summer barbecues or weeknight dinners. With its robust flavor and healthy ingredients, you’ll never miss the meat!
- Prep Time: 30 minutes
- Cook Time: 15 minutes
- Total Time: 45 minutes
- Yield: Serves 4
- Category: Main
- Method: Grilling
- Cuisine: Vegetarian
Ingredients
Scale
- 4 portobello mushroom caps
- 2 tbsp balsamic vinegar
- 1 tbsp low sodium soy sauce
- 1 tbsp olive oil
- 1 tbsp chopped rosemary
- 1–1/2 tsp steak seasoning
- 4 oz reduced fat Swiss cheese
- Whole wheat low-calorie buns
- Fresh vegetables (red onion, tomato, avocado)
Instructions
- In a mixing bowl, whisk together balsamic vinegar, soy sauce, olive oil, rosemary, and steak seasoning.
- Marinate the portobello caps in the mixture for 20-30 minutes.
- Preheat your grill to medium heat and lightly oil the grate.
- Grill the marinated mushrooms for 5-7 minutes on each side while basting with reserved marinade.
- Add Swiss cheese on top of mushrooms during the last minute to melt.
- Grill red onion slices for about 1 minute per side and toast the buns until golden brown.
- Assemble the burger with spinach, grilled mushrooms, onions, tomatoes, and avocado on whole wheat buns.
Nutrition
- Serving Size: 1 burger (200g)
- Calories: 350
- Sugar: 4g
- Sodium: 480mg
- Fat: 15g
- Saturated Fat: 5g
- Unsaturated Fat: 10g
- Trans Fat: 0g
- Carbohydrates: 40g
- Fiber: 8g
- Protein: 18g
- Cholesterol: 20mg