Marinated grilled portobello mushroom burgers recipe! These all-American portobello burgers are so tasty, even meat lovers love them. The BEST vegetarian cheeseburgers!
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.
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.
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.
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.
*Nutrition information includes cheese and bun, but not other burger toppings.