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+ servings
Grilled flat iron steak on a serving platter with a meat fork, pickled vegetables and sea salt.

Grilled Flat Iron Steak

Use ingredients you probably already have in the kitchen to make a great marinade for this Flat Iron Steak Recipe. It turns an affordable piece of beef into something juicy, tender and super flavorful.
4.5 from 14 ratings

Ingredients

For the Marinade:

  • 1 clove garlic roughly chopped
  • ¼ small white onion roughly chopped
  • ¼ cup vegetable oil
  • 2 tablespoons light brown sugar
  • 2 tablespoons orange juice
  • 2 tablespoons soy sauce
  • ½ teaspoon chili powder
  • ¼ teaspoon ground cumin

For the Steak:

  • 1 pound flat iron steak
  • 1 cup prepared giardiniera roughly chopped, for serving
  • Flaky sea salt for serving

Instructions

Make the Marinade:

  • Place all marinade ingredients in blender and blend until smooth. Makes a heaping 3/4 cup marinade.
  • Place steak in shallow baking dish or zip-top bag and pour marinade over steak. Cover and refrigerate at least 4 hours or up to overnight, turning once if possible.
  • Remove steak from marinade and allow excess marinade to drip off; discard marinade. Bring steak to room temperature for 30 minutes before cooking.
  • Preheat grill for direct grilling over medium-high heat. Transfer steak to grill and cook 4 minutes, turning once halfway through.
  • Reduce heat to medium and continue cooking 6 to 8 minutes longer or until center of steak reaches 130 degrees F for medium rare, turning occasionally.
  • Transfer steak to plate and cover lightly with foil. Let stand 5 minutes before thinly slicing across the grain.
  • Serve steak garnished with giardiniera and salt.

Notes

  • I grill my steak to a very rare doneness (120 to 130 degrees F when I pull it off the grill), as that’s how my family likes to eat it. If you like it more done, grill until 140 degrees for medium doneness. I don’t ever recommend going over 140 for good steak.
  • Invest in an instant read thermometer before grilling flat iron steak. This is the best, easiest way to check doneness without slicing into the steak and having its juices seep out.
Calories: 524kcal, Carbohydrates: 49g, Protein: 27g, Fat: 42g, Saturated Fat: 7g, Polyunsaturated Fat: 8g, Monounsaturated Fat: 8g, Trans Fat: 1g, Cholesterol: 75mg, Sodium: 2003mg, Potassium: 411mg, Fiber: 0.3g, Sugar: 7g, Vitamin A: 93IU, Vitamin C: 10mg, Calcium: 19mg, Iron: 3mg
This website provides estimated nutrition information as a courtesy only. You should calculate the nutritional information with the actual ingredients used in your recipe using your preferred nutrition calculator.
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