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Flank steak tacos with chopped onion and avocado topping on a white plate.

Flank Steak Tacos

These delicious flank steak tacos are grilled to tender, juicy perfection. They'll be your new favorite steak taco recipe!
5 from 2 votes
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Prep Time: 10 minutes
Cook Time: 10 minutes
Additional Time: 20 minutes
Total Time: 40 minutes
Servings: 4 servings (8 tacos total)
Author: Emily Wilson

Ingredients

  • 1 teaspoon Paprika
  • ½ teaspoon Ground Cumin
  • ½ teaspoon Garlic Powder
  • ½ teaspoon Chili Powder
  • 1 teaspoon Sea Salt divided
  • ½ teaspoon Dried Oregano
  • ¼ teaspoon Onion Powder
  • ½ teaspoon Ground Black Pepper
  • 1 pound Flank Steak
  • 2 tablespoons Olive Oil divided
  • 1 Small Red Onion finely diced
  • ⅓ cup Chopped Cilantro
  • 1 Ripe Avocado diced
  • 1 tablespoon Lime Juice
  • 8 Small Flour Tortillas
  • Optional toppings - crumbled queso fresco sliced jalapeños, or more lime juice

Instructions

  • Heat a grill to medium high heat (375 degrees F) or a grill pan over medium high heat.
  • Combine the paprika, cumin, garlic powder, chili powder, ½ teaspoon of sea salt, dried oregano, and black pepper in a small bowl. Stir to combine.
    A steak seasoning blend on a small white plate.
  • Brush both sides of the flank steak with 1 tablespoon of olive oil. Then sprinkle the seasoning mixture on both sides and pat it in so it sticks.
    Flank steak covered in spices on a cutting board.
  • Grill the steak for 4 to 5 minutes per side until it is medium doneness (and reaches an internal temperature of 135 to 145 degrees F on an instant-read thermometer).
    Flank steak on the grill.
  • Remove the steak from the grill and allow it to rest for at least 10 minutes before slicing.
    Grilled flank steak on a black cutting board.
  • Meanwhile, combine the remaining ½ teaspoon of salt, 1 tablespoon of olive oil, diced onions, chopped cilantro, diced avocado, and lime juice in a bowl. Stir to combine.
    An avocado red onion salsa being mixed in a small glass bowl with a spoon.
  • Heat the flour tortillas on the grill, over a gas stove, or in a frying pan so they are toasty and crisped.
    A tortilla being heated on a gas range.
  • Slice the flank steak into ¼-inch strips. If the strips are too large for the tortillas, cut them in half.
    Sliced flank steak on a cutting board.
  • Place the steak strips in the tortillas and top with the onion avocado mixture. Serve immediately.
    Flank steak tacos on a white plate.

Video

Notes

Cooking Tips - Clean your grill grates with a stiff brush while you are preheating it. If your grates are older or you are worried about the meat sticking, use tongs and a paper towel to coat the grates in some vegetable oil right before you add the meat.
Ingredient Tips - When purchasing flank steak, try to find a piece that has a uniform thickness, this will ensure even cooking time when grilling.
Recommended Cooking Temperature - I know you might be tempted to cook the steak to rare or medium rare, but when making tacos I actually prefer the meat cooked to medium (140 to 145 F on an instant read thermometer). It makes for tender steak that's easier to bite into when eating a taco.
Storage - Leftover steak for up to 3 days in the refrigerator in an airtight container. I recommend making the avocado onion mixture right before serving, you can save it in the refrigerator but the avocados will brown after a few hours in the fridge.

Nutrition

Serving: 1g | Calories: 691kcal | Carbohydrates: 62g | Protein: 41g | Fat: 31g | Saturated Fat: 8g | Polyunsaturated Fat: 21g | Cholesterol: 90mg | Sodium: 1076mg | Fiber: 7g | Sugar: 1g