Grilled Flat Iron Steak with Chimichurri Sauce

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Grilled Flat Iron Steak with Chimichurri Sauce is nice for a new twist on steak cooked on the grill and we loved this for a tasty dinner! And if you haven’t tried steak with Chimichurri Sauce, you have to try this herb-loaded sauce for beef; see tips if you don’t want to use cilantro!

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Square image of Grilled Flat Iron Steak with Chimichurri Sauce with sliced steak and sauce on serving plate.

Grilled Flat Iron Steak with Chimichurri Sauce is something that would be great to make over the holiday weekend or  whenever you feel like cooking on the grill. And I promise that this tasty steak with the perfect herb sauce for beef will definitely be a dish that will impress your friends and family.

It was my butcher who first recommended I try the cut of beef called Flat Iron Steak, telling me he was sure I’d like it. At first I thought this was just another name for flank steak, but I got interested when the butcher told me this cut of beef didn’t need to be marinated and was perfect for grilling. And I’ve been making this Grilled Flat Iron steak for years now!

What ingredients do you need for this recipe?

(This is only a list of ingredients; please scroll down for complete printable recipe. Or if you use the JUMP TO RECIPE link at the top of the page, it will take you directly to the complete recipe.)

What is Flat Iron Steak?

The Flat Iron Steak is a long thin piece of meat, sometimes called a top blade steak because it comes from the top of the blade chuck roast. Under the label on the piece of meat I bought (before this cut was more well known) it said, “You have just purchased a great new steak! The Flat Iron is cut from sections of larger roasts using a new cutting method. It is so tender, other than the tenderloin, you won’t find a more tender steak.”

Is Flat Iron Steak expensive?

I discovered this cut of meat back when it wasn’t as well known or expensive as it is now, but it’s still a pretty good buy compared to most steak that’s suitable for grilling.

What is Chimichurri Sauce?

Chimichurri Sauce is a South American condiment for beef that’s based on fresh herbs, garlic, and lemon juice or vinegar, and it’s sometimes called Argentinian Pesto.

What if you don’t like cilantro?

I know a green herby sauce that has a lot of cilantro won’t appeal to some people. But Chimichurri Sauce can definitely be made to taste, so just use the herbs you prefer. I think mint or basil could replace the cilantro, or use all parsley if you like.

What did we use in our Chimichurri Sauce?

We started with a generous amount of chopped cilantro and chopped flat-leaf parsley. Then Jake chopped up several tablespoons of finely-minced fresh garlic. This sauce is good on any kind of grilled meat, but it’s most well known for serving on beef.

What if You Don’t have an outdoor grill?

If you don’t have an outdoor grill, this can be cooked on a stove-top grill pan with ridges (affiliate link) or a George Foreman Grill (affiliate link) with good results.

Want more tasty ideas for steak on the grill?

If you love a good piece of steak cooked on the grill, check out Amazing Keto Steak Recipes for great ideas from around the web!

How to Make Grilled Flat Iron Steak with Chimichurri Sauce:

Grilled Flat Iron Steak with Chimichurri Sauce collage of recipe steps

(This is only a summary of the steps for the recipe; please scroll down for complete printable recipe. Or if you use the JUMP TO RECIPE link at the top of the page, it will take you directly to the complete recipe.)

  1. You can see from these nicely chopped herbs and garlic that Jake has great chopping skills, but you could also use a Food Processor (affiliate link) to make the Chimichurri Sauce.
  2. We mixed the sauce ingredients together and let flavors blend while we cooked the meat.
  3. I used Szeged Steak Rub (affiliate link) to season the steak, but my homemade Montreal Steak Seasoning would also be great. 
  4. Let the steak come to room temperature while you pre-heat the grill.
  5. Cooking time will depend on the thickness of the meat, and how well done you like it, but I cooked mine not quite 12 minutes for medium rare.
  6. If you have one, I recommend using an Instant Read Meat Thermometer (affiliate link) to check the temperature of meat on the grill. Here are the recommended temperatures: Rare (Cool red center) 125 F/51C,  Medium-Rare (Warm red center) 135F/54C, Medium (Rosy pink center) 145F62C.
  7. Be sure to let the meat rest for a few minutes before you cut it.
  8. Slice Flat Iron Steak against the grain and serve the sliced meat with Chimichurri Sauce.

Grilled Flat Iron Steak with Chimichurri Sauce shown on serving platter with more Chimichurri on the side.

Make it a Meal:

For a tasty low-carb meal, you can serve Grilled Flatiron Steak with Chimichurri Sauce with Grilled Zucchini, Marinated Fresh Mozzarella with Herbs, Sugar Snap Pea Salad, Spinach Salad with Bacon and Feta, or Cucumber Salad with Balsamic Dressing.

More Beef for Dinner:

Ingredients

  • 1 1/2 lb. piece Flat Iron Steak
  • 1 T Steak Rub

Chimichurri Sauce Ingredients:

  • 1/2 cup finely chopped cilantro leaves (about 1 cup before chopping)
  • 1/2 cup finely chopped flat leaf parsley leaves (about 1 cup before chopping)
  • 2 T minced garlic
  • 3 T fresh lemon juice
  • 2 tsp. red wine vinegar
  • 1 tsp. Aleppo pepper flakes (see notes)
  • 1 tsp. ground cumin
  • 1/2 cup olive oil

Instructions

  1. Take the steak out of the refrigerator at least 30 minutes before cooking, rub with steak rub, and let it come to room temperature.
  2. Wash cilantro leaves and parsley leaves and dry with paper towel or spin dry in salad spinner.
  3. Finely chop the cilantro, parsley, and garlic, either by hand or in a food processor with steel blade.
  4. Put ingredients into a bowl and add lemon juice, red wine vinegar, Aleppo Pepper (affiliate link) and cumin and stir to combine.
  5. Then stir in olive oil until mixture is well blended, and let sit at room temperature at least 15 minutes before serving.
  6. To cook steak, preheat gas or charcoal grill to medium-high heat. (You can only hold your hand there for 2-3 seconds at that temperature.)
  7. Put steak on grill at an angle. After about 3-4 minutes, or when you see nice grill marks starting, rotate 45 degrees and cook 3-4 minutes more on first side.
  8. Turn steak over and cook on the second side until the meat is done to your liking.
  9. I cooked my steak just under 12 minutes total for medium rare, but cooking time will depend on the heat of your grill, the temperature of the meat, and even the weather.
  10. If you have one, I recommend using an Instant Read Meat Thermometer (affiliate link) to check the temperature of meat on the grill. Here are the recommended temperatures: Rare (Cool red center) 125 F/51C,  Medium-Rare (Warm red center) 135F/54C, Medium (Rosy pink center) 145F62C
  11. When meat is done to your liking, remove from grill and let rest for 5 minutes, then cut into thin slices across the grain
  12. Serve hot, with Chimichurri sauce spooned over or on the side.

Notes

If you don’t have Aleppo Pepper (affiliate link), just use a smaller amount of cayenne pepper.

Recipe created by Kalyn. The grilling instructions came from the meat package and the Chimichurri Sauce was inspired by many other recipes around the web. 

Nutrition Information:

Yield:

4

Serving Size:

1

Amount Per Serving:
Calories: 645Total Fat: 50gSaturated Fat: 13gTrans Fat: 1gUnsaturated Fat: 33gCholesterol: 145mgSodium: 145mgCarbohydrates: 4gFiber: 1gSugar: 1gProtein: 44g

Nutrition information is automatically calculated by the Recipe Plug-In I am using. I am not a nutritionist and cannot guarantee 100% accuracy, since many variables affect those calculations.

Did you make this recipe?

Did you make this recipe? Please leave a star rating (under the PRINT button in the recipe) or share a photo of your results on Instagram! THANKS!

Grilled Flat Iron Steak with Chimichurri Sauce found on KalynsKitchen.com

Low-Carb Diet / Low-Glycemic Diet / South Beach Diet Suggestions:
Grilled Flatiron Steak with Chimichurri Sauce is a perfect main dish for low-carb or Keto diets, or for any phase of the original South Beach Diet. For the South Beach Diet, they recommend choosing meat with not more than 10% fat; other diets wouldn’t care about that.

Find More Recipes Like This One:
Use Grilling Recipes to find more recipes like this one. Use the Diet Type Index to find more recipes suitable for a specific eating plan. You might also like to follow Kalyn’s Kitchen on Pinterest, on Facebook, on Instagram, on TikTok, or on YouTube to see all the good recipes I’m sharing there.

Historical Notes for this Recipe:
This recipe was first posted in 2007 when Flat Iron Steak was a new thing on the grilling scene, and since then I have made it many times! It was updated with better photos in 2013 and updated again with more information in 2023.

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