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+ servings
Marinated flat iron steak, cooked and thinly sliced, on a platter.

Grilled Marinated Flat Iron Steak

This Flat Iron Steak Marinade uses pantry staples to create juicy, flavorful steak without complicated ingredients. Learn exactly how long to marinate, how to avoid common mistakes, and why this combination works so well for flat iron steak.
4.5 from 14 ratings

Ingredients

  • 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
  • 1 ¼ pounds flat iron steak
  • Flaky sea salt for serving

Instructions

  • Place garlic, onion, oil, brown sugar, orange juice, soy sauce, chili powder and cumin 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 flaky sea salt.
Calories: 330kcal, Carbohydrates: 4g, Protein: 28g, Fat: 22g, Saturated Fat: 7g, Polyunsaturated Fat: 5g, Monounsaturated Fat: 7g, Trans Fat: 1g, Cholesterol: 94mg, Sodium: 362mg, Potassium: 477mg, Fiber: 0.2g, Sugar: 4g, Vitamin A: 84IU, Vitamin C: 3mg, Calcium: 17mg, Iron: 4mg
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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