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mushroom burger with lettuce, tomato and red onion, on turquoise plate with pink beer bottle in backgroun

Portobello Mushroom Burger

Course: Entree
Cuisine: American
Keyword: balsamic mushroom burger, portobello mushroom burger recipe, vegan burger recipes
Prep Time: 20 minutes
Cook Time: 10 minutes
Total Time: 30 minutes
Servings: 4 burgers
Calories: 36kcal
Author: Ashley
Delish Portobello Mushroom Burgers! If you’re looking for an easy vegetarian and vegan friendly burger option, mushroom burgers are the way to go! Using a balsamic vinegar and olive oil marinade gives this recipe so much flavor.
Print Recipe

Ingredients

Mushroom Burgers

  • 4 large organic portobello mushrooms stems trimmed
  • 2 tablespoons balsamic vinegar
  • 2 tablespoons coconut aminos or tamari, or soy sauce
  • ½ teaspoon onion powder
  • ½ teaspoon garlic powder
  • ½ teaspoon paprika
  • ½ teaspoon black pepper
  • ¼ teaspoon fine sea salt

For Serving

  • 4 burger buns
  • 4 slices steak tomatoes
  • 4 slices red onion
  • lettuce or greens of choice
  • vegan mayo or other condiments

Instructions

  • Place mushrooms, tops up, in a shallow dish.
  • In a small bowl whisk together balsamic vinegar, olive oil, spices, salt and pepper. Pour over mushrooms and use a pastry brush to make sure mushroom caps have been well seasoned. Flip over and brush marinade into mushroom gills. Let sit for 10 minutes before flipping over and marinating for another 10 minutes. 
  • Meanwhile prepare the rest of the ingredients for serving.
  • After the mushrooms have marinated, add to a hot cast iron grill pan (or heated grill) and cook for about 5 minutes per side. If using a grill pan or outside, feel free to brush the mushrooms with leftover marinade. (If doing this in a traditional cast iron skillet, the mushrooms may get a little too soggy.)
  • Add lettuce to buns, then mushroom, cheese slices if using, tomato slices, onion and top bun with mayo if you'd like. Serve immediately with favorite sides like steak fries, sweet potato fries, or I like this brussels quinoa salad.

Notes

STORAGE: leftover grilled mushrooms will keep refrigerated for 2-3 days. Reheat in skillet over medium heat.
Nutrition info is for portobello mushroom burgers only and no buns or toppings.

Nutrition

Serving: 1 burger | Calories: 36kcal | Carbohydrates: 7g | Protein: 2g | Fat: 0.3g | Saturated Fat: 0.1g | Polyunsaturated Fat: 0.1g | Monounsaturated Fat: 0.03g | Trans Fat: 0.003g | Sodium: 325mg | Potassium: 331mg | Fiber: 1g | Sugar: 3g | Vitamin A: 125IU | Vitamin C: 0.1mg | Calcium: 8mg | Iron: 0.4mg