Name: Sheet Pan Portabello Mushroom Fajitas
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Cuisine: Mexican
Ingredients: 1/4 cup soy sauce; 2 Tbsp red wine vinegar; 3 Tbsp neutral oil (like canola or grapeseed) – divided; 1/2 tsp granulated garlic; 1/2 tsp ground cumin; 1/8 tsp crushed red pepper flakes; 2 portabello mushroom caps; 1 red bell pepper; 1 red onion; 8, 6 inch flour tortillas; for serving: diced tomatoes, diced avocado, fire-roasted corn, shredded cheese, sour cream, cilantro, lime wedges

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Fajitas are always a crowd-pleasing dinner. Make them plant-forward by swapping in juicy, marinated portabello mushrooms for the meat! They’re cooked on a sheet pan with the peppers and onions to speed things up so these are weeknight-friendly.

portobello mushroom fajitas ingredients including toppings

Mexican food makes a frequent appearance in our household but fajitas always seem to be the forgotten meal. We love them, they’re simple, but we usually opt for the easier and equally delicious counterparts: tacos and burrito bowls.

For some reason it always seems so time-intensive to prepare the meat. So why not make them vegetarian?

Let me tell you about these mushroom fajitas. They are totally weeknight-friendly and bursting with flavor. Portabello mushrooms are drenched in an umami flavor bomb of soy sauce, red wine vinegar, garlic and crushed red pepper flakes before getting cooked until tender and perfect. A single sheet pan is all you need to cook everything so it couldn’t be simpler to throw these together.

Also, hello veggies! It’s such a feel-good meal.

sliced and marinated portobello mushrooms in a bowl

Why mushrooms?

Mushrooms are a favorite ingredient in any plant-forward kitchen. They bring the umami component to a dish (which is typically missing when you cut back on meat). For fajitas, you also need something that has a similar shape to the more traditional strips of chicken or steak and portabellos work perfectly.

Benefits of sheet pan meals:

Simple to prep ahead
It makes cooking easier and faster
Cleanup is a breeze, especially if you use parchment paper

sliced mushrooms, red bell peppers and onions on a sheet pan

Recommended fajita toppings

You can use whatever you like for toppings on these, but here are some of my favorites for mushroom fajitas:

Pico de gallo
Guacamole (or diced avocado)
Fire-roasted corn (can buy frozen, or make yourself)
Cilantro
Limes
Sour cream or plain Greek yogurt
Shredded cheese

platter of cooked mushrooms and fajita veggies

I also love how beautiful this meal is for entertaining. You can arrange everything on platters just like they do it in restaurants (steamy hot cast iron skillet optional!).

Be sure to offer plenty of accompaniments so each person gets to build their own and it’s a guaranteed hit. Now who wants one?