Grilled Marinated Portobello Burgers

These Grilled Marinated Portobello Burgers are thick and juicy and soak up all the delicious flavors of the marinade. Perfect for meat lovers and veggie lovers alike, and fully fresh, not processed like the meatless burgers on the market.

Here, these Grilled Marinated Portobello Burgers are served topped with Homemade Roasted Red Peppers and my yummy Easy Pesto Dressing, alongside homemade Grilled Sweet Potato Wedges. All the fixings for a healthy but fun family BBQ night!

Grilled Marinated Portobello Burgers

Grilled Marinated Portobello Burgers

These meatless Grilled Marinated Portobello Burgers are thick and juicy and perfect for meat lovers and veggie lovers alike.
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Servings 4 people


For Portobello Burgers

  • 4 large (not baby) portobello mushrooms , stems removed and dirt rinsed away (see Notes)
  • 4 tablespoons balsamic vinegar
  • 1 1/2 teaspoons soy sauce
  • 2 tablespoons olive oil
  • 1/4 teaspoon ground thyme
  • 1/4 teaspoon dried oregano
  • 1/8 teaspoon black pepper
  • 4 slices provolone or swiss cheese , optional
  • 4 whole wheat hamburger buns or sandwich thins , optional
  • Grilled onion, fresh tomato, greens , optional
  • 1 roasted bell pepper (see Instructions below)
  • 1/4 cup homemade light pesto dressing (see Instructions below)
  • grilled sweet potato wedges (see Instructions below)


  • Add portobello mushrooms to a resealable bag or shallow container. Top with vinegar, soy, oil and spices. Marinate in the refrigerator for 15-20 minutes, turning once to coat evenly.
  • Grill 3-5 minutes per side on indoor or outdoor grill, brushing with leftover marinade on each side as they cook (cooking time depends on how hot your grill gets).

To Serve

  • Top each burger with a slice of provolone cheese.
  • If desired, top with tomato and greens or grilled onion. To grill onion, slice in thick slices, brush with olive oil and throw directly on the grill 3-5 minutes per side.
  • Serve alongside a handful of my Grilled Sweet Potato Wedges.

To Finish


To clean portobello mushrooms, I like to use a wet towel to rinse away the dirt. Running or soaking in water can make a soggy mess.
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