Balsamic Red Wine Flat Iron Steak |

Balsamic Red Wine Flat Iron Steak

This balsamic red wine flat iron steak is a simple meal that tastes anything but! A mix of kitchen staples like balsamic vinegar, BBQ sauce, and red wine results in a flavorful marinade and pan sauce that amps up the flavor of tender flat iron steak.
Course Main Dish
Cuisine American
Prep Time 1 hour 25 minutes
Cook Time 15 minutes
Total Time 1 hour 40 minutes
Servings 4
Calories 493kcal
Author Alyssa


  • 1/3 cup balsamic vinegar
  • 1/3 cup plus 1/2 cup red wine, divided
  • 1/3 cup BBQ sauce, (your favorite)
  • 1 tbsp olive oil
  • 1 tsp black pepper
  • 1/2 tsp salt
  • 1 1/2 - 2 lb. flat iron steak


  • Cut flat iron steak into 1" - 1 1/2" pieces and place in a container that you'll use to marinade it in.
  • Combine the balsamic vinegar, red wine, BBQ sauce, olive oil, black pepper, and salt in a bowl and pour it over the steak pieces. Cover and place dish in the refrigerator to marinade for 45 minutes to 1 hour (or at least a half hour), flipping the pieces over halfway through.
  • Remove the dish from the refrigerator and let sit at room temperature for about 20 minutes. While the steak is sitting, preheat oven to 400 degrees F and place a large cast iron skillet in oven to preheat.
  • After 20 or so minutes, place skillet on stove top over medium to medium-low heat and lightly grease the bottom with olive oil. Immediately add steak pieces to skillet in a single layer and cook for approximately 7 minutes per side so that a crust forms, or to your preferred doneness. Remove steak to a separate plate.
  • While the skillet is still hot, turn the stove top off and pour about 1/2 cup of red wine into the skillet and swirl it around. The wine will reduce very quickly and thicken. Using a wooden spoon or spatula, remove the pan sauce and pour over steak. Serve over mashed potatoes or alongside your favorite steak side dish.


Nutritional info is estimated for the steak and the pan sauce. It does not include any mashed potatoes or vegetables for serving.


Calories: 493kcal | Carbohydrates: 8.6g | Protein: 52.7g | Fat: 23.1g | Saturated Fat: 8.2g | Cholesterol: 145mg | Sodium: 643mg | Potassium: 91mg | Fiber: 0.1g | Sugar: 5.7g | Calcium: 20mg | Iron: 6.3mg