Kings Flat Iron Steak Sandwich

Kings Flat Iron Steak Sandwich

Jackie B. 1

"My husband drools when this is made. It is a perfect balance of flavors and leaves you full and wanting more the next day!"


35 m servings 890 cals
Serving size has been adjusted!

Original recipe yields 4 servings



  • Calories:
  • 890 kcal
  • 45%
  • Fat:
  • 54.5 g
  • 84%
  • Carbs:
  • 43.2g
  • 14%
  • Protein:
  • 59.5 g
  • 119%
  • Cholesterol:
  • 161 mg
  • 54%
  • Sodium:
  • 1134 mg
  • 45%

Based on a 2,000 calorie diet

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  • Prep

  • Cook

  • Ready In

  1. Preheat an oven broiler on high heat.
  2. Open the sandwich rolls and spread each with about 1 teaspoon of softened butter. Sprinkle each buttered sandwich roll with about 1/2 teaspoon garlic powder.
  3. Broil the sandwich rolls about 5 minutes, until the edges are slightly charred. Set aside.
  4. Heat a large, heavy skillet over high heat, and add the vegetable oil. When oil just begins to smoke, drop in the flat iron steaks and quickly sear until steaks are browned, about 3 minutes. Flip the steaks and sear the other side for another 3 minutes; remove steaks immediately, or lower the burner temperature and cook to the desired degree of doneness. Set steaks aside and keep warm.
  5. Assemble each sandwich roll with spinach leaves, tomato and avocado slices on one side, and 2 slices of mozzarella cheese on the other side. Sprinkle the tomato and avocado side with about 1/2 teaspoon of balsamic vinegar, and place a hot browned steak on the mozzarella cheese. Fold each sandwich closed to serve.


  • Tip
  • Aluminum foil can be used to keep food moist, cook it evenly, and make clean-up easier.
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Your rating



  1. 17 Ratings


This was very good - unfortunately flat irons are not available in my area but my butcher recommended sirloin steak instead. Everyone, even the kids, loved it. We will be enjoying this one aga...

Anyone who likes steak is sure to love this. I made a bunch of them. Some I used Mozzerella but I ran short on that and put Bleu Cheese on the others. The result was KILLER. The Bleu cheese...

One word, awesome! local grocery store was out of flat iron steaks so I used skirt...only thing I did different was I added a healthy amount of salt and pepper to the sliced tomato and avo...

It was really delicious. I added a little salt to the avocado, but other than that it was amazing!

good concept but flat iron steaks, unless they are marinated are not tender enough for this sandwich. not a lot of flavor either. My husband and I found this bland and will not be making again.

Yum!!!! I seasoned the steak with salt and pepper before searingg and then sliced it thin for the sandwiches... I also used lettuce and roasted red peppers in lieu of the tomato and avocado an...

Giving this recipe 2-* is a high rating. These "sammies" simply lack flavor even with the balsamic vinegar, using leftover marinated flank steak from the previous day and sprinkling a sm.amt. of...

These were excellent. My whole family enjoyed them. Flat Iron Steak is a perfect steak for these sandwiches.

wonderful recipe! the only thing I changed was I used gyro meat instead because I have a hard time digesting steak. My whole family loved these sandwiches and that is saying alot...thank you for...