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A Portobello Mushroom Burger with a grilled mushroom cap, lettuce, tomato, red onion, and provolone cheese, served on a toasted brioche bun.

Savory Portobello Mushroom Burger

A hearty and flavorful Portobello Mushroom Burger with a smoky marinade, perfect for vegetarians or anyone craving a plant-forward meal.
Prep Time 15 minutes
Cook Time 10 minutes
Total Time 25 minutes
Course Main Course
Cuisine American
Servings 4 burgers
Calories 280 kcal

Equipment

  • Grill or Grill Pan
  • Mixing Bowl
  • Tongs
  • Basting Brush
  • Measuring Cups
  • Knife
  • Cutting Board

Ingredients
  

Main Ingredients

  • 4 large Portobello mushroom caps stems removed
  • 3 tbsp olive oil
  • 1 tbsp balsamic vinegar
  • 1 tbsp soy sauce low-sodium
  • 1 tsp Dijon mustard
  • 1 tsp garlic powder
  • ½ tsp smoked paprika
  • ¼ tsp black pepper
  • salt to taste
  • 4 burger buns brioche or whole-grain recommended

Optional Toppings

  • lettuce
  • sliced tomato
  • red onion slices
  • cheese slices optional, provolone or vegan cheese

Instructions
 

  • In a mixing bowl, whisk together olive oil, balsamic vinegar, soy sauce, Dijon mustard, garlic powder, smoked paprika, and black pepper.
  • Place Portobello mushroom caps in the bowl and coat them with the marinade. Let them sit for at least 15 minutes, flipping halfway.
  • Preheat your grill or grill pan to medium-high heat. Lightly oil the grill grates or pan surface.
  • Grill the mushrooms for 4–5 minutes on each side, or until tender. For cheese, place a slice on the mushrooms during the last minute of cooking.
  • Lightly toast the burger buns on the grill or in a pan if desired.
  • Assemble the burgers by placing each mushroom cap on a bun and adding toppings like lettuce, tomato, red onion, and cheese. Serve immediately.

Notes

For best results, ensure mushrooms are patted dry before marinating to avoid excess moisture. Add a pinch of chili flakes for extra heat if desired.

Nutrition

Calories: 280kcalCarbohydrates: 34gProtein: 6gFat: 12gSaturated Fat: 2.5gSodium: 450mgPotassium: 400mgFiber: 3gSugar: 5gVitamin A: 60IUVitamin C: 8mgCalcium: 100mgIron: 2.2mg
Keyword Grilled Mushroom, Healthy Recipe, Portobello Mushroom Burger, Vegetarian Burger
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