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Home » Recipes » Main Course

Blackened Flank Steak Tacos with Avocado Lime Sauce

Yum

Published: Aug 27, 2021 · Modified: Mar 19, 2025 by Sara · This post may contain affiliate links

These Blackened Flank Steak Tacos with Avocado Lime Sauce are so incredibly tender and flavorful! This will definitely kick up your next taco night!

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Blackened Flank Steak Tacos with Avocado Lime Sauce

I have been using my Homemade Blackened Seasoning on everything lately. I’ve used it on Shrimp, Chicken, Fish, and now for these steak tacos!

You can make the Blackened Seasoning ahead of time, I usually always have a jar on hand. All you need is:

  • 2 Tbs ground Smoked Paprika
  • 1 tsp ground Cayenne
  • 1 tsp Garlic Powder
  • 1 tsp Onion Powder
  • 1/2 tsp dried Oregano
  • 2 tsp Sea Salt
  • 1 tsp Black Pepper
Blackened Flank Steak Tacos with Avocado Lime Sauce

Then sprinkle the seasoning generously over the Flank Steak and rub it in on all sides to coat it well. Let steak rest at room temperature for 30 minutes prior to grilling. While steak is resting make the Avocado Lime Sauce!

Add all ingredients for the Avocado Lime Sauce to a large food processor and blend until smooth and creamy, you may need to add more Avocado Oil depending on how creamy you like it.

Taste and add more Salt or Pepper if desired, set aside.

Blackened Flank Steak Tacos with Avocado Lime Sauce on a plate

Heat grill to med/high heat or about 400F. Grill Flank Steak over direct heat 5-7 minutes each side until internal temp is 135F for medium rare (see notes in the recipe card for other cooking temps).

Remove and let rest for 5 minutes.

Heat Tortilla shells on the grill for 1-2 minutes each side until slightly crisp.

Now the key to making the Flank Steak nice and tender is to slice it very thin. The first time I made this I made the mistake of cutting it up too thick and found it hard to chew. So cut as thin as you can!

Blackened Flank Steak Tacos with Avocado Lime Sauce

Make your tacos and top with the Avocado Lime Sauce. I also topped these with Pico De Gallo, Cotija Cheese, and Cilantro. But you can use whatever else you want to add!

What to Serve with Flank Steak Tacos

  • Grilled Mexican Street Corn

More Blackened Seasoning Recipes

  • Blackened Shrimp Quinoa Salad with Avocado Cilantro Dressing
  • Blackened Chicken Caesar Salad
  • Blackened Mahi Mahi Sandwich
  • Blackened Tuna Steaks
  • Blackened Mahi Mahi Tacos with Mango Slaw
  • Black and Blue Burgers
  • Blackened Shrimp Cobb Salad
Blackened Flank Steak Tacos

If you try this recipe let me know what you think! Leave a comment below, rate it, share it on social media, or take a picture and tag it tastefulventure on Instagram! I LOVE seeing what you guys cook up.

Cheers!

More Steak Recipes

  • New York Strip Steak with Blue Cheese Butter
  • How to Grill the Perfect Ribeye
  • Flank Steak Tacos with Avocado Corn Salsa
  • Steakhouse Pork Tenderloin Bowls with Cilantro Garlic Sauce

Blackened Flank Steak Tacos with Avocado Lime Sauce

Sara
These Blackened Flank Steak Tacos with Avocado Lime Sauce are so incredibly tender and flavorful! This will definitely kick up your next taco night!
Print Recipe Pin Recipe
Prep Time 15 minutes mins
Cook Time 10 minutes mins
Total Time 25 minutes mins
Course Dinner
Cuisine Mexican
Servings 4
Calories 603 kcal

Ingredients
  

For the Blackened Seasoning:

  • 2 Tbs ground Smoked Paprika
  • 1 tsp ground Cayenne
  • 1 tsp Garlic Powder
  • 1 tsp Onion Powder
  • 1/2 tsp dried Oregano
  • 2 tsp Sea Salt
  • 1 tsp Black Pepper
  • 1 1/2 – 2 lbs Flank or Skirt Steak

For the Avocado Lime Sauce:

  • 3 Avocados pitted and peeled
  • 3 Cloves Garlic
  • Juice from 2 Limes
  • 1/2 tsp Sea Salt
  • 1/2 tsp Pepper
  • 1/4 cup Avocado Oil

For the Tacos:

  • Corn Tortillas
  • Pico De Gallo
  • Cotija Cheese
  • Cilantro
  • Whatever else you want to add

Instructions
 

  • Mix all the ingredients for the Blackened Seasoning together and sprinkle over the Flank Steak, rubbing it in to coat all sides
  • Let steak rest at room temperature for 30 minutes prior to grilling
  • While steak is resting make the Avocado Lime Sauce
  • Add all ingredients for the Avocado Lime Sauce to a large food processor and blend until smooth and creamy, you may need to add more Avocado Oil depending on how creamy you like it
  • Taste and add more Salt or Pepper if desired, set aside
  • Heat grill to med/high heat or about 400F
  • Grill Flank Steak over direct heat 5-7 minutes each side until internal temp is 135F for medium rare (see notes for other cooking temps)
  • Remove and let rest for 5 minutes
  • Heat Tortilla shells on the grill for 1-2 minutes each side until slightly crisp
  • Slice the Flank Steak very thin, it will be more tender this way
  • Make your tacos and top with Avocado Lime Sauce
  • Enjoy!

Notes

If you have leftover Blackened Seasoning you can store it in an air tight container in the cupboard with your other spices.
If you don’t like your steak medium rare, just cook a little longer. See cooking temps below, also note it depends on the thickness of your steak to how many minutes to cook on each side. I find it helpful to use a good digital thermometer to test the doneness.
  • 120 – 130 degrees F = Rare
  • 130 – 140 degrees F = Medium Rare
  • 140 – 150 degrees F = Medium
  • 160 – 170 degrees F = Well Done

Nutrition

Calories: 603kcalCarbohydrates: 15gProtein: 40gFat: 44gSaturated Fat: 8gPolyunsaturated Fat: 5gMonounsaturated Fat: 28gCholesterol: 102mgSodium: 2428mgPotassium: 1341mgFiber: 10gSugar: 1gVitamin A: 293IUVitamin C: 16mgCalcium: 66mgIron: 4mg
Keyword Blackened Flank Steak Tacos with Avocado Lime Sauce, flank steak tacos, grilled flank steak, steak tacos, Tacos
Tried this recipe?Let us know how it was!

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Welcome!

Hi! I’m Sara, and welcome to Tastefulventure! Here at Tastefulventure I’ve been testing gluten free recipes for over 11 years in hopes of sharing everything I’ve learned with you. I’m a foodie who loves to experiment with many different ingredients. 

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