Recipes Global Cuisines Asian Asian Flat Iron Steak 4.7 (18) 14 Reviews 6 Photos In this recipe, tender flat iron steak meets trendy Asian bistro-style flavor! With a side of Asian vegetables and rice, it's an easy, delicious dinner! Submitted by GMUCHEFWHIT Updated on March 17, 2025 Save Rate Print Share Close Add Photo 6 6 6 6 Prep Time: 10 mins Cook Time: 15 mins Additional Time: 3 hrs 5 mins Total Time: 3 hrs 30 mins Servings: 4 Jump to Nutrition Facts Cook Mode (Keep screen awake) Ingredients 1x 2x 4x Oops! Something went wrong. Our team is working on it. This recipe was developed at its original yield. Ingredient amounts are automatically adjusted, but cooking times and steps remain unchanged. Note that not all recipes scale perfectly. Original recipe (1X) yields 4 servings ½ cup reduced-sodium soy sauce ¼ cup rice wine vinegar ¼ cup brown sugar ¼ cup sliced green onions 1 tablespoon minced garlic 1 tablespoon mustard powder 2 pounds flat iron steak 2 tablespoons sesame seeds (Optional) Directions Whisk soy sauce, vinegar, brown sugar, green onions, garlic, and mustard powder together in a bowl; pour into a resealable plastic bag. Add steak, coat with marinade, squeeze out excess air, and seal the bag. Marinate in the refrigerator, 3 to 4 hours. Remove steak from marinade; shake off excess. Discard remaining marinade. Heat a non-stick skillet over medium-high heat. Add steak; cook until outside is seared, about 1 minute per side. Continue cooking until desired doneness is reached, about 5 minutes more per side. An instant-read thermometer inserted into the center should read 140 degrees F (60 degrees C) for medium. Transfer steak to a cutting board; rest before cutting, 3 to 5 minutes. Sprinkle sesame seeds over steak. Editor's Note: The nutrition data for this recipe includes the full amount of marinade ingredients. The actual amount of marinade consumed will vary. Save Print I Made It 54 home cooks made it! Nutrition Facts (per serving) 538 Calories 29g Fat 19g Carbs 50g Protein Show Full Nutrition Label Hide Full Nutrition Label Nutrition Facts Servings Per Recipe 4 Calories 538 % Daily Value * Total Fat 29g 37% Saturated Fat 10g 52% Cholesterol 155mg 52% Sodium 1214mg 53% Total Carbohydrate 19g 7% Dietary Fiber 1g 4% Total Sugars 14g Protein 50g 100% Vitamin C 2mg 2% Calcium 74mg 6% Iron 2mg 9% Potassium 123mg 3% * Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs. ** Nutrient information is not available for all ingredients. Amount is based on available nutrient data. (-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.