Grilled Balsamic and Soy Marinated Flank Steak Recipe -
Grilled Balsamic and Soy Marinated Flank Steak Recipe
  • READY IN 55 mins

Grilled Balsamic and Soy Marinated Flank Steak

Recipe by  

"Flank steak is a perfect grilling meat. It's marbleized with fat that melts while grilling and fills the meat with the flavor of natural juices. If you have a lot of marinade leftover from this recipe, save it in your refrigerator and use it to marinate other grilled meats or chicken; it will last up to one week."

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Ingredients Edit and Save

Original recipe makes 4 servings Change Servings
  • PREP

    10 mins
  • COOK

    15 mins

    55 mins


  1. Whisk onion, garlic, olive oil, balsamic vinegar, soy sauce, Dijon mustard, rosemary, salt, and pepper together in a mixing bowl.
  2. Put the flank steak in a large resealable plastic bag. Pour marinade into the bag and coat steak with the marinade. Squeeze excess air from the bag and seal. Marinate in the refrigerator at least 30 minutes, up to 2 days.
  3. Preheat an outdoor grill for medium-high heat and lightly oil the grate.
  4. Remove the flank steak from the marinade and shake to remove excess liquid. Reserve marinade.
  5. Cook steak until firm, hot in the center, and just turning from pink to grey, 6 to 8 minutes per side, brushing occasionally with reserved marinade. An instant-read thermometer inserted into the center should read 150 degrees F (65 degrees C). Remove steak to a cutting board and rest meat 5 minutes before slicing thinly across the grain.
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  • Cook's Notes:
  • The nutrition data for this recipe includes the full amount of the marinade ingredients. The actual amount of the marinade consumed will vary.
  • If you wish to serve extra marinade with the finished beef, pour marinade into a small saucepan and bring to a boil over high heat. Reduce heat to medium-low and simmer 10 minutes.

Reviews More Reviews

Mar 14, 2013

This was a very flavorful marinade. The london broil came out very tender. I didn't add any salt because the soy sauce is salty enough for us. This will definitely be in the rotation!

Feb 24, 2013

LOVED THIS! Yes, truly! I used the exact ingredients except went short on the salt, but I didn't need to. I would not cook this meat as written, however, as you can tell by my photo! When cut in thin slices, this meat as rare is perfect! It is a perfect recipe! Thank you so much! This will be a repeat for sure---maybe this week!

Sep 29, 2013

AMAZING! Made exactly as recipe called for. I let it marinate for 7 hours and the flavor was delish! The hubby said one of the best steaks he has ever had.

Apr 15, 2013

WONDERFUL WONDERFUL WONDERFUL! Did this exactly as written, marinated for 24 hours and we'll do this again over and over without changing one thing!

Jun 23, 2014

Very good, but still doesn't reach the level of my mother-in-law's, which is the reason for the 4-star rating. I did, however, like the contrast of the balsamic; I think it really stood out in the dish, in a good way. This is easy to throw together and will probably make again. It's a healthier alternative to those flank marinades with brown sugar.

Aug 30, 2013

Used Pomegranate Balsamic Vinegar as it was all I had on hand. Wasn't crazy about the taste of the marinade, but let the steak marinate in the fridge for 2 days. Really like the results.

Jun 08, 2013

This recipe was awesome and super easy. I marinated a top sirloin overnight and threw it on the charcoal grill. Cooked it med rare. After serving it to guests with corn on the cob and grilled asparagus, everyone thought I was a genius! One friend whispered to me to send the recipe to his wife!! I followed recipe exactly-except for the onions (a guest doesn't like them) and the steak was soooo tender and delicious. Many thanks for posting this.

Oct 03, 2014

Wow, this was amazing. Marinated it 24 hours and followed recipe. I didn't have a grill though, so I broiled it 2-3 inches from broiler for 10 minutes one side and about 5 the other and though it didn't have the char-grilled taste I would have loved, it was still amazing! I will definitely make this again.


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  • Calories
  • 307 kcal
  • 15%
  • Carbohydrates
  • 8 g
  • 3%
  • Cholesterol
  • 38 mg
  • 13%
  • Fat
  • 20.5 g
  • 32%
  • Fiber
  • 0.8 g
  • 3%
  • Protein
  • 22 g
  • 44%
  • Sodium
  • 1622 mg
  • 65%

* Percent Daily Values are based on a 2,000 calorie diet.

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