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The Best Grilled Portobello Mushroom Burger (Easy Recipe!)

A hand holding a large, delicious, and fully assembled homemade Portobello Mushroom Burger at a summer barbecue.

A simple and delicious recipe for a vegan grilled portobello mushroom burger. In this healthy dish, large portobello mushroom caps are used as a satisfying, meaty ‘patty.’ The mushrooms are marinated in a simple mixture of olive oil, balsamic vinegar, and tamari, then grilled on a grill or grill pan until they are tender and juicy. The grilled mushroom caps are served on hamburger buns with a variety of classic burger toppings.

Ingredients

  • 4 large portobello mushrooms, stems removed
  • Extra-virgin olive oil, for drizzling
  • Balsamic vinegar, for drizzling
  • Tamari, for drizzling
  • Sea salt and freshly ground black pepper
  • For Serving:
  • 4 hamburger buns, warmed or toasted
  • Lettuce
  • Sliced tomato
  • Sliced red onion
  • Pickles
  • Ketchup, mayonnaise, and/or mustard
  • Pesto, Guacamole, or Chipotle Sauce

Instructions

  1. Clean the mushroom caps by wiping them with a damp cloth or paper towel.
  2. Place the mushrooms in a rimmed plate or shallow dish. Drizzle them with olive oil, balsamic vinegar, and tamari. Sprinkle with salt and several grinds of pepper.
  3. Use your hands to rub the seasonings into the mushrooms, coating them on both sides.
  4. Heat a grill or grill pan to medium heat.
  5. Place the mushrooms, gill-side up, onto the grill. Cook for 5 to 7 minutes on the first side.
  6. Flip the mushrooms and cook for another 5 to 7 minutes on the second side, or until the mushrooms are tender.
  7. Serve the grilled mushroom burgers on the hamburger buns with your desired fixings.

Notes

  • This is a quick and easy vegetarian and vegan alternative to a traditional beef burger.
  • Wiping the mushrooms clean with a damp towel is the preferred method, as washing them under water can make them waterlogged.
  • This recipe is highly customizable; feel free to add your favorite burger toppings like cheese, avocado, or special sauces.
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