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The marinated portobello mushrooms make these fajitas substantive and flavorful. Cook the peppers and onions until they’re a bit blackened for even more flavor.

Portobello Mushroom Fajitas [Vegan]

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Cooking Time



  • 8 six-inch flour tortillas
  • 2 tablespoons plus 1 teaspoon olive oil (separate)
  • 2 tablespoons lime juice
  • 2 garlic cloves, minced
  • ¼ teaspoon crushed red pepper flakes
  • ¼ teaspoon ground cumin
  • 1 tablespoon soy sauce (or Bragg’s liquid aminos)
  • 4 large portobello mushroom caps, sliced ¼-inch thick
  • 1 small yellow onion, sliced
  • 1 medium red bell pepper, sliced
  • 1 medium green bell pepper, sliced
  • ¼ teaspoon salt
  • 8 ounces guacamole
  • Salsa verde and lime wedges for serving
  • Fresh ground pepper to taste


  1. Preheat oven to 300 degrees fahrenheit. Wrap tortillas in foil and place them in the oven to keep warm for serving.
  2. In a large bowl, combine 2 tablespoons olive oil, lime juice, garlic, crushed red pepper flakes, ground cumin and soy sauce. Add sliced portobello mushrooms and toss to combine. Set aside as you prepare the remaining ingredients.
  3. In a large sauce pan, heat remaining teaspoon of olive oil. Add onion and cook 2-3 minutes until soft, stirring occasionally. Add red and green bell peppers, salt and fresh ground pepper to taste. Cook about 10 minutes until peppers are soft. (I like them a bit blackened on the edges). Transfer pepper mixture to a bowl or plate and set aside.
  4. Reheat the same pan where you cooked the peppers, add the portobello mushroom mixture. Cook 7-10 minutes until mushrooms have released their liquid and it has mostly evaporated. Add the pepper mixture back into the pan and cook another 1-2 minutes, stirring frequently.
  5. In each heated tortilla, place approximately 1 tablespoon of guacamole down the center. Add a serving of portobello pepper mixture and top with salsa verde.

Nutritional Information

Per Serving: Calories: 485 | Carbs: 61 g | Fat: 25 g | Protein: 13 g | Sodium: 783 mg | Sugar: 9 g Note: The information shown is based on available ingredients and preparation. It should not be considered a substitute for a professional nutritionist’s advice.


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