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A whole marinated flank steak on a cutting board with a knife, towel, and garnish off to the side

The BEST Flank Steak Marinade

  • Author: Melissa Belanger
  • Prep Time: 10 minutes
  • Cook Time: 10 minutes
  • Total Time: 70 minutes
  • Yield: 2 about 3/4 cup 1x
  • Category: Mains
  • Cuisine: American


This is seriously the best flank steak marinade you will ever try. Oven broiled or gilled, this classic steakhouse inspired recipe will give you flavorful, tender meat with just a hint of sweetness, every time. Let your flank steak marinate overnight for maximum flavor.



  • 1 1/22 pounds flank steak
  • 1/4 cup Worcestershire sauce
  • 2 tablespoons reduced sodium soy sauce
  • 2 tablespoons olive oil
  • 1 tablespoon honey (or brown sugar)
  • 1 tablespoon whole grain mustard
  • 1 tablespoon tomato paste
  • 1 tablespoon capers
  • 2 teaspoons minced garlic (2 cloves)
  • 1 teaspoon molasses
  • 1/2 teaspoon coarse salt


  1. For the marinade:
  2. Whisk or stir marinade ingredient together in a medium bowl until smooth. Cover flank steak and allow it to marinate overnight in the refrigerator (or for a minimum of 1 – 2 hours).
  3. Remove steak and discard marinade. Season with salt & pepper before cooking.
  4. To broil:
  5. Preheat broiler and broiler pan in the oven. Place steak on the broiler pan and cook for 7 – 9 minutes, or until steak reaches 135˚F for medium rare.
  6. Remove steak from oven and allow it to rest on a cutting board *affiliate link for 5 – 10 minutes before slicing.
  7. To grill:
  8. Preheat grill to medium-high (about 450–500˚F). Grill steak for 4 – 5 minutes per side, turning once, or until steak reaches 135˚F for medium-rare.
  9. Remove steak from grill and allow it to rest for 5 – 10 minutes before serving.


For best results, thinly slice flank steak against the grain with a sharp knife. Serve immediately.