Marinated Flank Steak Tacos

Flank steak is one of those cuts of meat that we want to love, but seem to have a hard time preparing correctly. We tend to buy it in a pinch when we don’t want something as decadent as a ribeye. It’s thin like a strip steak but is still a tough cut of meat- it really tastes best after it has been marinated for a few hours, or ideally overnight. After a few attempts at marinating, we finally feel like we have a much better approach to flank steak.

What we love about this recipe is how vinegary the marinade is. The vinegar helps break down the steak and makes it much more tender than cooking it straight away. We have used the steak for tacos in this recipe, but it is versatile enough that you can eat it as is with grilled vegetables or with a drizzle of chimichurri

Marinated Flank Steak Tacos 
Makes: 4 servings 
Prep Time: 24 hours    Total Time: 25 hours 

Ingredients For The Steak: 

  • 1.5 – 2 lbs flank steak 
  • 3/4 cup olive oil 
  • 2/3 cup red wine vinegar 
  • 4 garlic cloves, smashed 
  • salt and pepper  

Ingredients For The Tacos: 

  • 8-12 tortillas, warmed 
  • 3/4 cup cotija cheese, crumbled 
  • 1/4 red onion, thinly sliced 
  • tomatillo salsa 
  • 1 lime, cut into wedges 

Directions: 

  1. Combine the olive oil, red wine vinegar, and smashed garlic in a gallon ziplock bag or a pyrex baking dish. Pat the flank steak dry with paper towel and season it well on both sides with salt and pepper. Add the flank steak to the marinade and refrigerate for at least 4 hours, ideally overnight. Remove from the refrigerator 15-20 minutes before you want to cook the steak to bring it back up to room temperature. 
  2. When it is time to cook the steak, heat a large cast iron skillet over medium-high heat. Let the pan get very hot, letting it get warm for a few minutes, before adding the steak. Cook the steak for 3-4 minutes per side, depending on how close to medium-rare you want the steak prepared. Remove the steak from the pan and let it rest for 8-10 minutes before slicing. 
  3. Serve the steak sliced in tacos with the taco ingredients listed above, or any preferred taco accompaniments. Slice the steak and serve immediately. 

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