Grilled Chili Lime Flank Steak

This grilled flank steak is seasoned with the smoky flavors of chili powder, paprika, and cumin. Combined with the sweetness of honey and a zip of lime juice, this flank steak is flavorful, but doesn't cover the tender, meatiness of the cut.

How to Grill Flank Steak
Nick Evans

Flank steak is an odd cut of beef. I don’t care what anyone says. It’s fairly lean, relatively affordable, and its texture has a coarse, ropy look. At first glance you might say, “No thanks, I’ll take the New York Strip!”

But flank steak, also known as London Broil, is a delightful cut of meat. It cooks quickly, takes marinades beautifully, and is easy to serve to a crowd! You’ve probably eaten it before and never realized it because it’s the cut most often used for fajitas.

The Secret to Tender, Juicy Flank Steak

You really need a three-pronged approach.

  1. Use acid in your marinade. It helps to break down proteins in the meat, making it more tender.
  2. Flank steak is lean. Like most lean meats you need to cook it fast and hot!
  3. Finally, slice it thin across the grain of meat, which shortens the muscle fibers, creating a more tender bite of meat.

That’s it!

Flank Steak Marinade Recipe
Nick Evans

What Makes a Good Flank Steak Marinade?

Flank steak needs a little acid to help tenderize the fibrous muscle and provide flavor. Do this, and you will have tender, succulent slices of beef. Skip this step, and there’s a good chance you’ll be chewing shoe leather.

Vinegar and lime juice are both great with flank steak. I also tested this recipe with buttermilk, but I personally didn’t care for it and thought the vinegar and lime juice did a better job of both seasoning and tenderizing the beef.

How Long Should I Marinate Flank Steak?

I came across some research that said you shouldn’t marinate flank steak longer than two hours because it could “scorch” or toughen the meat. The reason you’ll see this is because acid breaks down proteins, and when those proteins break down too much water is released and the muscle becomes tough.

Marinades in tighter cuts of meat like flank steak really don’t penetrate deep into the tissue like they would with fish, so you have a little more leeway.

I tested this marinade after two hours, and again after eight hours. Both times the meat was tender and flavorful. I also tried it after 24 hours and found the meat a little tough compared to the others. Just to be on the safe side, I wouldn’t marinate this overnight.

Flank Steak Marinade Recipe
Nick Evans

Can You Marinate and Freeze Flank Steak?

Feel free to freeze this steak with the marinade! Make the marinade in a zip top bag, add the steak and turn to coat. Squeeze as much air out as possible, then store it in the freezer for up to 3 months.

Take the steak out of the freezer and thaw it in a bowl of water a couple of hours before you want to grill it or the morning before you plan to grill it.

How to Grill Flank Steak

Flank steak is an odd shaped cut where one end is usually thicker than the other by as much as an inch. This alone can make cooking it a challenge, but this is actually an easy problem to solve using one of two methods.

  • Method 1: Pound it thin. Cover the surface of the steak with parchment or plastic wrap. Then use either a meat mallet or heavy skillet to pound the thickest part of the steak until it’s closer in size to the thinner parts. Then marinate as directed.
  • Method 2: Cook it over two heat zones. Create a hot and warm zone in your gas or charcoal grill. Place the thickest part of the steak on the hot zone, and the thinner part over the warm zone. This is my preferred method.
Grilled Flank Steak Marinade with Lime
Nick Evans

How Long to Grill Flank Steak

Lean cuts of meat like flank steak are really best when served medium rare. If you cook it to the medium stage or beyond, the meat is tough and chewy rather than juicy and succulent, so shoot for medium rare even if it’s not your normal range.

Remember, too, that time is variable. To get a perfectly cooked steak every time, insert a meat thermometer through the side of the thickest part of the steak.

  • Medium: 8 minutes per side (145°F)
  • Medium Rare: 6 to 7 minutes per side (135°F)
  • Rare: 5 to 6 minutes per side (125°F)

These times are based on cooking the steak with the two-zone method, not the method of pounding the meat thinner. The cooking times may be faster if you used the pounding method.

Need More Grilled Meat? Try These!

Grilled Chili Lime Flank Steak

Prep Time 5 mins
Cook Time 12 mins
Marinade 2 hrs
Total Time 2 hrs 17 mins
Servings 4 servings

Flank steak is an oddly-shaped cut with varying degrees of thickness. It can lead to the thinner section being cooked well-done while the thicker section is rare. That might work for your family, but if you want consistency either pound the thickest part of the steak with a meat mallet before marinating it or cook it over two heat zones as described in this recipe. Either way works.


  • 1 1/2 to 2 pounds flank steak

For the marinade:

  • 1/4 cup white wine vinegar

  • Juice from half lime

  • 4 large cloves garlic, minced

  • 2 tablespoons Worcestershire sauce

  • 2 tablespoons honey

  • 2 teaspoons smoked paprika

  • 2 teaspoons chili powder

  • 1 1/2 teaspoons kosher salt

  • 1 teaspoon dried thyme

  • 1 teaspoon cumin

  • 1 teaspoon freshly cracked pepper

  • 1/2 teaspoon crushed red pepper flakes


  1. Make the marinade:

    In a dish large enough for the flank steak to lay flat combine vinegar, lime juice, garlic, Worcestershire sauce, honey, smoked paprika, chili powder, salt, thyme, cumin, ground pepper, and red pepper flakes. Just use a fork or whatever you have lying around to mix it all together.

    Grilled Flank Steak Recipe
    Nick Evans
  2. Coat the steak:

    Once the marinade is mixed together, toss the steak in the marinade and turn it a few times to make sure the surface area is coated. Cover and place it in the fridge for at least 2 hours and as long as 8 hours.

    How to Grill Flank Steak
    Nick Evans
  3. Preheat the grill:

    Prepare a charcoal grill for two-zone grilling, so half is hot and the other half is warm. The grill is hot when you can only hold your hand over the hot zone for a second or two.

    On a gas grill , heat the grill to 450°F with two burners going, which should only take about 10 minutes, then turn one of the burners down to medium to create two cooking zones.

  4. Grill the steak:

    Remove the steak from the marinade. Discard the marinade. Put the thickest part of the steak over the hottest side of the grill, and the thinner side over the warm zone. Close the lid and sear for 7 minutes. Open the lid, flip the steak, close the lid. Cook for an additional 6 to 7 minutes. Meat should be medium to medium rare.

    Flank Steak Marinade Recipe
    Nick Evans
  5. Rest and slice:

    Let the steak rest for about 5-10 minutes. Then cut into thin slices (less than 1⁄2 inch thick), at a diagonal angle across the grain. Arrange on a platter and serve.

    Best Flank Steak Marinade
    Nick Evans
Nutrition Facts (per serving)
453 Calories
19g Fat
4g Carbs
63g Protein
Show Full Nutrition Label Hide Full Nutrition Label
Nutrition Facts
Servings: 4
Amount per serving
Calories 453
% Daily Value*
Total Fat 19g 24%
Saturated Fat 8g 39%
Cholesterol 179mg 60%
Sodium 630mg 27%
Total Carbohydrate 4g 2%
Dietary Fiber 0g 2%
Total Sugars 3g
Protein 63g
Vitamin C 3mg 15%
Calcium 57mg 4%
Iron 4mg 25%
Potassium 823mg 18%
*The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Nutrition information is calculated using an ingredient database and should be considered an estimate. In cases where multiple ingredient alternatives are given, the first listed is calculated for nutrition. Garnishes and optional ingredients are not included.