Easy Steak Fajitas

4.48 from 48 votes

I use marinated flank steak to make delicious steak fajitas that are tender and flavorful.

Prep Time10

Cook Time15

Total Time25

Course: Dinner Recipes

Cuisine: American

Servings: servings

Calories: 708kcal

Season the flank steak with 1 tablespoon of fajita seasoning, rubbing it evenly over the surface. Place the steak in a shallow dish or Ziploc bag and pour in the store-bought marinade. Ensure the steak is well-coated. Marinate in the refrigerator for 2-4 hours or up to overnight.
Heat 2 tablespoons of oil in a large cast iron skillet over medium-high heat. Add the sliced peppers, red onion, and 1/2 tablespoon of fajita seasoning. Cook them for 6-8 minutes, stirring occasionally, until the vegetables are tender and slightly charred. Remove them from the skillet and set aside.
Remove the steak from the marinade and discard the steak fajita marinade. Heat the remaining 2 tablespoons of oil in the same skillet over high heat. Once it becomes hot, add the steak and sear for 3-4 minutes on each side for medium-rare. Adjust cooking time for your desired doneness.
Transfer the steak to a cutting board and let it rest for 5 minutes. This allows the juices to redistribute within the meat. After resting, slice the steak against the grain into thin slices.
Serve the sliced steak and cooked vegetables on tortillas, garnished with fresh cilantro, cheese, and guacamole if desired.

Can use leftover steak by cutting the leftover steak into strips and placing them in the skillet with the cooked peppers and onions until reheated.