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An angled view of a cast iron skillet filled with steak fajitas.
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4.97 from 29 votes

20 Minute Steak Fajitas

These easy fajitas are made with juicy flank steak and homemade seasoning, all ready in 20 minutes. One bite, and you’ll wonder why you don’t make steak fajitas every night!
Prep Time5 minutes
Cook Time15 minutes
Total Time20 minutes
Course: Main Dish
Cuisine: Mexican
Keyword: Steak Fajitas
Servings: 10 fajitas
Author: Rachel Farnsworth

Ingredients

Fajita Seasoning Mix

  • 2 teaspoons ground cumin
  • 2 teaspoons chili powder
  • 1 teaspoon onion powder
  • 1 teaspoon salt
  • 1 teaspoon crushed red pepper flakes

Steak Fajitas

  • 1 1/2 pounds flank steak thinly sliced against the grain
  • 2 tablespoons olive oil
  • 3 medium multi-color bell peppers sliced
  • 1 medium red onion sliced
  • 8 ounces sliced mushrooms
  • 2 cloves minced garlic
  • 1 tablespoon Worcestershire sauce
  • 1/4 cup lime juice about 2 limes
  • 10 (6-inch) flour tortillas for serving
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Instructions

  • In a small bowl, stir together 2 teaspoons ground cumin, 2 teaspoons chili powder, 1 teaspoon onion powder, 1 teaspoon salt, and 1 teaspoon crushed red pepper flakes. Set aside.
  • Thinly slice 1 1/2 pounds flank steak against the grain. Slice 3 medium multi-color bell peppers, 1 medium red onion, and 8 ounces of mushrooms. Mince 2 cloves of garlic.
  • Heat a large skillet over high heat. Add in 2 tablespoons olive oil, let heat for a minute, and then add in your sliced bell peppers, onion, and mushrooms. Cook until the vegetables are tender-crisp, about 7 minutes, stirring frequently.
  • During the last two minutes of cooking add in half of your seasoning mix and 2 cloves minced garlic Cook an additional 1 to 2 minutes. Remove the vegetables from the pan and set aside on a plate or in a bowl.
  • Return the skillet to high heat. Add the thinly sliced flank steak to the hot skillet. Sprinkle the remaining fajita seasoning and 1 tablespoon Worcestershire sauce over the steak. Cook, tossing constantly, for 2 to 3 minutes for medium-rare doneness (cook for an additional 3 to 4 minutes if you prefer well-done steak).
  • When the steak is cooked, add the cooked vegetables back to the skillet. Drizzle with 1/4 cup lime juice and toss everything together to combine.
  • Serve the steak fajitas on warm flour tortillas. Add optional toppings like sour cream, cilantro, guacamole, or salsa.

Video

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Nutrition

Serving: 1fajita | Calories: 241kcal | Carbohydrates: 22g | Protein: 19g | Fat: 9g | Saturated Fat: 2g | Cholesterol: 41mg | Sodium: 506mg | Potassium: 509mg | Fiber: 2g | Sugar: 5g | Vitamin A: 1725IU | Vitamin C: 66.3mg | Calcium: 60mg | Iron: 2.8mg
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