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  1. Food and Cooking
  2. Recipes
  3. Mushroom Fajitas

Mushroom Fajitas

The smoky marinade delivers bold, rich flavor in every bite.

By Ree DrummondPublished: Jul 23, 2025
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pioneer woman mushroom fajitas
Ryan Liebe
Yields:
4 - 6 serving(s)
Prep Time:
35 mins
Total Time:
1 hr

It’s no secret that I’m a sucker for a juicy steak (I mean, have y’all tried Ladd's favorite steak sandwiches?), but every now and then, I like to mix things up and go the veggie route. That’s when these flavor-packed mushroom fajitas come to the rescue. Portobello mushrooms have a rich, hearty texture that even the die-hard meat eaters in my house happily devour. And when you toss them in a bold, smoky fajita marinade? They’re downright irresistible. Pile them high with fresh pico de gallo and creamy avocado for a simple, delicious weeknight dinner straight off the grill.

Do you need a grill to make mushroom fajitas?

You can certainly make this recipe indoors without a grill. Use a grill pan over medium-high heat and follow the recipe as written.

Can you make fajitas with other mushrooms besides portobellos?

Yes! Smaller cremini or white button mushrooms make great substitutes for portobellos in fajitas. For easy grilling, thread the marinated mushrooms on soaked wooden skewers or metal skewers. They can be cooked at the same time as the other vegetables. Grill them, covered, until the mushrooms are tender and lightly charred, 3 to 4 minutes per side.

What are some good ways to use leftover mushroom fajita filling?

If you end up with extra mushrooms, they make highly versatile leftovers. They reheat quickly in a hot skillet. Try chopping them up and tossing them into fried rice or serving them with scrambled eggs for breakfast. They're also delicious cooked into a quesadilla or added to a burrito bowl with your favorite toppings like guacamole and chipotle corn salsa.

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Ingredients

For the Mushrooms:

  • 1 1/2 lb.

    portobello mushrooms (about 6 large) 

  • 1/4 cup

    olive oil

  • 2 Tbsp.

    Worcestershire sauce 

  • 1 Tbsp.

    light brown sugar

  • 2 tsp.

    cumin

  • 2 tsp.

    kosher salt

  • 1 tsp.

    black pepper

  • 1 tsp.

    crushed red pepper flakes

  • Juice of 2 limes, plus wedges for serving

  • 2

    garlic cloves, finely chopped

  • 12

    flour tortillas, warmed

  • Fresh cilantro, sliced jalapeño, sliced avocado, and salsa, for serving

For the Vegetables:

  • 1 Tbsp.

    vegetable oil, plus more for the grill

  • 3

    bell peppers (any color), sliced

  • 1

    onion, sliced

  • 1 tsp.

    chili powder

  • 1 tsp.

    garlic powder

  • 1 tsp.

    kosher salt

  • 1/2 tsp.

    black pepper

Directions

    1. Step 1For the mushrooms: Clean the mushroom caps by wiping away any dirt and cutting off any remaining stems with a paring knife. Scrape off the gills on the underside of each cap with a small round spoon.
    2. Step 2In a 2-quart baking dish, whisk together the olive oil, Worcestershire sauce, light brown sugar, cumin, salt, black pepper, crushed red pepper flakes, lime juice, and garlic. Add the mushrooms to the marinade, flipping to coat. Cover and marinate at room temperature for 20 minutes. 
    3. Step 3For the vegetables: Meanwhile, preheat a grill to medium-high (400°F to 450°F) and rub the grates with vegetable oil. 
    4. Step 4Toss the bell peppers and onion with the vegetable oil, chili powder, garlic powder, salt, and black pepper in a large bowl. Arrange the vegetables in a grill basket in a single layer. 
    5. Step 5Add the grilled basket to the grill and cook, covered, until the peppers and onions are tender and slightly charred, 5 to 7 minutes per side. (If using a wok-style grill basket, cook, stirring once halfway through.) Transfer the vegetables to a platter and keep warm. 
    6. Step 6Remove the mushrooms from the marinade, pat dry, and grill, uncovered, until nicely charred, 3 to 4 minutes per side; remove to a cutting board.
    7. Step 7Slice the mushrooms and serve with the peppers and onions, tortillas, lime wedges, and toppings of your choice.  

Tip: Mushroom fajitas can be stored in an airtight container in the refrigerator for up to three days. Reheat them in a skillet over medium heat. 

Love this recipe? Try one of these next!
  • Fajita Vegetables
  • Chicken Fajitas
  • Steak Fajitas
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