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Grilled Flank Steak with Mom’s Sauce

Ron Manville

Servings: 6

Clark Frasier’s mom used to serve this sauce with grilled salmon, and it’s a favorite standby condiment at Arrows restaurant. It is terrific with salmon, but also particularly tasty with flank steak, a flavorful cut of meat. By marinating the steak in the sauce you’re adding even more flavor to this delicious cut of meat.

This recipe is excerpted from Maine Classics. Read our review.


  • 1 cup red wine vinegar
  • 1 cup balsamic vinegar
  • 1/4 cup Worcestershire sauce
  • 1/4 cup soy sauce
  • 1/2 cup firmly packed brown sugar
  • 2 Tbs. whole-grain mustard
  • 2 Tbs. blanched and chopped fresh rosemary
  • 1 cup olive oil
  • 1 cup extra virgin olive oil
  • Kosher salt and freshly ground black pepper
  • 3 lb. flank steak


  • In a large bowl combine the red wine vinegar, balsamic vinegar, Worcestershire sauce, soy sauce, brown sugar, mustard, rosemary, both olive oils, and salt and pepper to taste. Whisk together until thoroughly blended. Reserve half the sauce for later use. Add the steak to the remaining sauce in the bowl and marinate for at least 1 hour or overnight.

    Heat the grill as hot as it will go and cook the steak for about 2 minutes on each side for medium rare (4 minutes per side for medium). Remove the steak from the grill and place on a cutting board. Allow the steak to rest for 2 minutes and then slice into half-inch slices. Serve at once with the reserved sauce.


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Reviews (3 reviews)

  • Krispie | 09/05/2017

    This was easy and very tasty. I would definitely make again.

  • dickyg | 07/07/2014

    this will be my go to for flank and other steaks

  • User avater
    JDilegge | 07/14/2011

    Tender, rich in flavor and just delightful!

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