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+ servings
Portobello mushroom burger with tomato on a metal plate

Grilled portobello mushroom burgers

Marinated grilled portobello mushroom burgers recipe! These all-American portobello burgers are so tasty, even meat lovers love them. The BEST vegetarian cheeseburgers!

Course dinner, entree
Cuisine American
Keyword vegetarian
Prep Time 10 minutes
Cook Time 15 minutes
Marinating time 30 minutes
Total Time 55 minutes
Servings 2 burgers
Calories 251 kcal
Author Trish Bozeman


  • 2 large portobello mushrooms
  • 1/2 cup vegetarian Worcestershire sauce
  • 1/4 cup balsamic vinegar
  • 1 Tbsp garlic powder
  • 2 slices cheddar cheese or American cheese
  • 2 medium burger buns
  • Your favorite burger toppings: mayo, ketchup, mustard, lettuce, tomato, onion, pickle, etc...


  1. Remove the stem from the mushrooms and peel the top layer of skin off the top (see above for more details). Remove the gills with a spoon and wash the mushrooms well. Pat dry.

  2. Combine the worcestershire sauce, balsamic vinegar, and garlic powder in a shallow dish. Add the mushroom and rub the marinade in. Let marinate, turning the mushrooms once or twice, for 30 minutes.

  3. Heat your grill over medium heat. Cook the mushrooms over a low flame, gill side down for 5 minutes. Flip and cook for another 5 minutes. Melt the cheese on the mushrooms gill side up. Remove from heat.

  4. Spread your favorite burger condiments like mayo and ketchup on a bun and place the portobello burger on the bottom bun. Top with your favorite burger toppings like lettuce, tomato, onion, and pickle.

Recipe Notes

*Nutrition information includes cheese and bun, but not other burger toppings.

Nutrition Facts
Grilled portobello mushroom burgers
Amount Per Serving (1 burger)
Calories 251 Calories from Fat 72
% Daily Value*
Fat 8g12%
Saturated Fat 4g20%
Cholesterol 18mg6%
Sodium 338mg14%
Potassium 454mg13%
Carbohydrates 34g11%
Fiber 2g8%
Sugar 10g11%
Protein 11g22%
Vitamin A 170IU3%
Vitamin C 1mg1%
Calcium 206mg21%
Iron 2mg11%
* Percent Daily Values are based on a 2000 calorie diet.