These tender, juicy grilled flank steak tacos are robustly flavored and topped with refreshing avocado salsa. In about 45 minutes, I'll show you how to make this fantastic recipe with step by step instructions.

With a simple spice blend you'll add great flavor to the meat without needing to spend time marinating.

Several grilled flank steak tacos on a white oval plate.

Why I Love Flank Steak Tacos

I love serving these tacos for a weekend BBQ with friends or as a special weeknight meal for the family (hello, taco Tuesday). We're huge fans of the Mexican and Tex-Mex restaurants in our area and often go out or get delivery tacos, but sometimes you just want to make your own - especially if you've got an outdoor grill!

Beef Taco Ingredients

Flank Steak - An inexpensive and flavorful cut of meat that slices easily, making it perfect for tacos!
Seasoning Blend - you'll make a robust steak taco seasoning mixture with paprika, cumin, garlic powder, chili powder, salt, oregano, onion powder, and black pepper.
Avocado Salsa - this refreshing topping includes fresh avocado, diced red onion, chopped fresh cilantro, lime juice, extra virgin olive oil, and salt.
Small Tortillas - you'll need 8 small flour tortillas (4 ½ inch width); sometimes these are labeled 'street tacos', and they usually come in a package of 20 to 24 tortillas.
Optional Toppings - crumbled queso fresco, sliced jalapeños, or more lime juice

See the recipe card for quantities.

Flank steak taco ingredients on a marble background.

Substitutions & Variations

Toppings - if you'd prefer not to use avocado and red onions, you can top the tacos with pico de gallo or salsa. Swap the queso fresco out for crumbled cotija cheese or even feta cheese.
Meat - while this recipe calls for flank steak, you can just as easily use skirt steak for these as well! Use the same amount, but because skirt steak is a bit thinner, you may only need to grill it for 3 to 4 minutes per side.
Tortillas - feel free to use small corn tortillas for this recipe as well!

Grilled flank steak tacos on a white oval plate with lime wedges.

What to Serve with Tacos

If you try this easy steak taco recipe, let me know! Connect on Instagram and share your photos or leave a star rating below.

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

Print Pin Rate

Prep Time: 10

Cook Time: 10

Additional Time: 20

Total Time: 40

Servings: 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.
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.
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).
Remove the steak from the grill and allow it to rest for at least 10 minutes before slicing.
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.
Heat the flour tortillas on the grill, over a gas stove, or in a frying pan so they are toasty and crisped.
Slice the flank steak into ¼-inch strips. If the strips are too large for the tortillas, cut them in half.
Place the steak strips in the tortillas and top with the onion avocado mixture. Serve immediately.

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.