Flank steak tacos are an easy-to-prepare weeknight meal packed full of flavor. The meat is marinated in citrus, garlic, and spices and then grilled for just a few minutes. Then piled high onto corn tortillas and topped with your choice of delicious toppings!
In a large bowl, whisk together the olive oil, lime, garlic, cumin, salt, and pepper. Transfer to a zip-top bag. Add the steak and press out any excess air before sealing. Marinate at room temperature at least 20 to 30 minutes or up to 24 hours in the refrigerator. Set out 30 minutes before grilling.
Remove the steak from the marinade and pat the steak dry with paper towel. Season each side with kosher salt and pepper.
Preheat the grill to medium-high heat. Place steak on the grill and cook to desired internal temperature (about 6 minutes per side for medium, depending on thickness of steak). See notes for cooking temperatures.
Let rest 5 to 10 minutes before slicing against the grain.
Prep desired toppings while steak is resting. (I like to add diced tomatoes, avocado, and onions with the cilantro lime crema (recipe in notes) on top of the cilantro and cotija cheese.)
Place steak on top of warm tortillas. Top with cilantro and cotija cheese and any other desired toppings. Serve while warm.
Cooking steak in the oven: Preheat the broiler. Place steak on a baking sheet. Cook, turning once halfway through, until cooked to desired internal temperature (about 6 minutes per side for medium rare, depending on thickness of steak). See notes below for cooking temperatures.Steak doneness:
Medium Rare (130°-140°F)
Medium Well (150°-160°F)
Well (Over 160°F)
Make ahead: This marinade can be made up to 3 days in advance, however I don't recommend marinating the meat longer than 24 hours. Typically I like to add the meat in the morning and grill that evening. Storing: Discard any leftover marinade and do not reuse. You can store leftover meat in a covered container in the refrigerator up to 3 days. Toppings: The additional toppings are not included in nutritional value. Feel free to add as you prefer.Cilantro Lime Crema: For a delicious flavor, add this sauce on top: In a food processor, blend 1/2 cup sour cream, 1/4 cup cilantro, 1 lime (zested and juiced), 1 clove garlic, and 1/2 teaspoon salt. Blend until smooth. Salt and pepper to taste.