Sundried Tomato Rosemary Balsamic Marinated Flank Steak

4.5 from 2 votes
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Grilled flank steak is even more juicy and mouthwatering when you let it soak in an easy balsamic marinade made with sundried tomatoes and rosemary. Just stir together this 5-ingredient marinade recipe, then fire up the grill to enjoy this lean and flavorful cut of beef as the centerpiece to many family dinners.

Sundried Tomato Rosemary Balsamic Marinated Flank Steak recipe image

Back when The Hubby and I started dating, he had been doing the Atkins diet. I pretty much destroyed that, with my love for ice cream, and his love for doing anything to make me happy.

One night he wanted to make dinner for me. He chose a lasagna recipe that he had made before – the heck with Atkins, he wanted to impress me. And I was impressed…  several hours later.

You see, the flame in his old oven had a tendency to blow out if you shut the door for too fast. But we didn’t realize this until 45 minutes into the 1 hour cooking time. As far as I can remember, it was delicious, but maybe just because I was STARVING.

Honestly, though, I was more impressed with his grilling skills. The Hubby knows how to grill a steak. And flank steak is often our meat of choice.

Usually, we season it simply with coarse sea salt, pepper, and maybe some grill seasoning. But every once in a while, we like to mix it up a little, which I did with this simple marinade. After I provide the flavor, I turn it over to the Grill Master to work his magic.

Look at that – grilled flank steak cooked to perfection!

Grilled Flank Steak on a white rectangular plate

Rosemary Balsamic Marinade for Grilled Flank Steak

A simple, 5-ingredient marinade is all it takes to add incredible flavor to a grilled steak! Don’t let grilling season get away without making this grilled steak recipe.

I wrote the balsamic marinade recipe to use with flank steak, but it would make a great marinade for London broil or other cuts of steak. I bet it would be great even with chicken or veggies. So if you are looking for something different to add flavor to what you are grilling this summer, give this a try.

Pick up a flank steak from the store. Typically you’ll find these cuts of beef to be about 1 1/2 to 2 1/2 pounds, and this balsamic marinade recipe is plenty for that size steak. It never hurts to grill two so you can use the leftovers on a steak salad, and it’s simple to double the marinade.

  • Balsamic vinegar
  • Sundried tomatoes – preferable the kind packed in oil. You can use the dried, but they will take longer to hydrate and infuse their favorite. Plus the oil is so flavorful that it can be used as the olive oil for the marinade
  • Olive oil – or, for even more flavor, use the oil from the jar of sun dried tomatoes.
  • Rosemary – preferably fresh, but dried works as well.
  • Garlic

How long should you marinate flank steak?

Cuts of beef like flank steak need quite a while to marinate; at least 12 hours, and preferably overnight. That time in the marinade will break down the fibers in the meat. As a result, you’ll end up with grilled flank steak that practically melts in your mouth!

How to grill flank steak

  1. Preheat your grill to high heat.
  2. Remove the steak from the marinade and season both sides liberally with coarse sea salt and freshly ground pepper.
  3. Grill the flank steak on direct, high heat for 4-7 minutes a side, depending on thickness and desired doneness. For a 2 lb flank steak, about 5-6 minutes a side produces a nice, medium-rare steak.

For the most tender steak, let it rest for several minutes after taking off the grill, then slice thinly against the grain.

Slices of grilled flank steak on a platter with a meat fork

Make it a meal

Classic steak dinner

Summer barbecue

Cool weather steak supper

Dinner on the grill

Keto meal

Use the leftovers

Flank Steak wrapped in foil after grilling

More balsamic beef recipes

More steak recipes

A cutting board holds thin slices of balsamic marinated flank steak.
4.5 from 2 votes

Balsamic Marinated Flank Steak

Juicy Balsamic Marinated Flank Steak is bathed in a flavorful marinade featuring sundried tomatoes and rosemary and grilled to perfection.
Prep: 10 minutes
Cook: 10 minutes
marinating time 1 hour
Total: 1 hour 20 minutes


  • 1 flank steak (about 1.5-2.5 lbs)
  • ¼ cup balsamic vinegar
  • 3 sun dried tomatoes, preferably packed in oil, finely chopped
  • 2 tablespoons of the oil from the sun dried tomatoes, or 2 tablespoons olive oil
  • 1 teaspoon chopped fresh rosemary or ½ teaspoon dried rosemary
  • 1 garlic clove, minced or crushed
  • coarse sea salt
  • freshly ground pepper


  • Combine balsamic vinegar, tomatoes, oil, rosemary, and garlic in a large plastic bag or shallow dish.
  • Add the steak and marinate for at least an hour (the longer, the better)
  • Preheat your grill to high heat.
  • Remove the steak from the marinade and season both sides liberally with coarse sea salt and freshly ground pepper.
  • Grill the flank steak on direct, high heat for 4-7 minutes a side, depending on thickness and desired doneness. For a 2 lb flank steak, about 5-6 minutes a side produce a nice, medium-rare steak.
  • Slice thinly against the grain and serve.
Nutrition Facts
Balsamic Marinated Flank Steak
Amount Per Serving
Calories 261 Calories from Fat 108
% Daily Value*
Fat 12g18%
Saturated Fat 3g15%
Cholesterol 90mg30%
Sodium 86mg4%
Potassium 550mg16%
Carbohydrates 2g1%
Sugar 1g1%
Protein 32g64%
Vitamin A 20IU0%
Vitamin C 1.7mg2%
Calcium 35mg4%
Iron 2.4mg13%
* Percent Daily Values are based on a 2000 calorie diet.
Disclaimers: Please discuss your individual dietary needs (i.e. gluten free) with a physician. Even when not specified, be sure to verify all ingredients are gluten free, if needed, by reading labels on all packaging and/or confirming with the manufacturer this varies by brand and can change at any time. Nutrition information shown is an estimate and not guaranteed to be accurate.



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