How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Portobello Mushroom Fajitas?

You need 13 ingredients. The key ingredients include: 1 tablespoon olive oil, 4 cups (1/2-inch-thick) slices portobello mushrooms (about 8 ounces), 1 cup vertically sliced red onion, 1 cup (1/4-inch-thick) green bell pepper strips, and more.

Is Portobello Mushroom Fajitas suitable as snacks & appetizers?

Yes, Portobello Mushroom Fajitas falls under the Snacks & Appetizers category and is a great choice for this type of meal.

How do I store leftover Portobello Mushroom Fajitas?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Portobello Mushroom Fajitas Recipe

Name: Portobello Mushroom Fajitas
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1 tablespoon olive oil; 4 cups (1/2-inch-thick) slices portobello mushrooms (about 8 ounces); 1 cup vertically sliced red onion; 1 cup (1/4-inch-thick) green bell pepper strips; 2 garlic cloves, minced; 3 tablespoons chopped fresh cilantro; 1 tablespoon fresh lime juice; 1/4 teaspoon salt; 1/4 teaspoon freshly ground black pepper; 1 serrano chile, minced; 12 (6-inch) flour tortillas; 1 cup (4 ounces) crumbled queso fresco; 3/4 cup salsa verde

Try this homemade Portobello Mushroom Fajitas recipe the whole family will love. Made with olive oil, portobello mushrooms, red onion and green bell pep…

This Portobello Mushroom Fajitas relies on simple, everyday ingredients such as olive oil, vertically sliced red onion, garlic cloves, minced and chopped fresh cilantro. It comes together quickly and makes 4 servings, at about 1299 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Snacks & Appetizers

1299

kcal

Calories

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

A good 1:1 gluten-free flour blend works well if you need a gluten-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

Saved locally in your browser — visible only to you.

Portobello Mushroom Fajitas

Tips for the best results

Variations & substitutions

My Personal Notes

How did you like this recipe?

Frequently Asked Questions