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three steak tacos setting on wood with two squeezed limes

Grilled Aussie Grassfed Flat Iron Steak Tacos

Weeknight meals can't get any easier. After an easy overnight marinade, you can grill up tender, flavorful steak tacos in under 10 minutes.
Course Main Course
Cuisine Mexican
Keyword beef, flat iron, steak, tacos
Prep Time 2 hours 5 minutes
Cook Time 10 minutes
Total Time 2 hours 15 minutes
Servings 6
Calories 283 kcal
Author Christie Vanover


  • 2 lbs Aussie grass-fed flat iron steaks
  • 2 cloves cloves garlic minced
  • 1/2 cup soy sauce
  • 1/4 cup red wine vinegar
  • juice of 2 limes
  • 1/2 tsp kosher salt
  • 1/2 tsp black pepper
  • 1/2 tsp garlic powder
  • 1/2 tsp onion powder
  • 1/2 tsp ground cumin
  • 1/4 tsp cayenne pepper


  1. Mix all of the ingredients in a zip-top bag and marinate at room temperature for 2 hours or in the refrigerator overnight.
  2. Heat the grill to medium-high heat. Remove the meat from the marinade. Grill for 3 minutes per side.

  3. Remove from the grill, and let rest for 10 minutes. Slice the beef against grain.

  4. Serve with tortillas, onions, cabbage and limes.


When trimming a whole flat iron, cut the beef horizontally. There is a membrane that runs down the center of the cut. Removing this membrane ensures that every bite is taco tender.

Nutrition Facts
Grilled Aussie Grassfed Flat Iron Steak Tacos
Amount Per Serving
Calories 283 Calories from Fat 135
% Daily Value*
Fat 15g23%
Saturated Fat 5g31%
Cholesterol 99mg33%
Sodium 1387mg60%
Potassium 508mg15%
Carbohydrates 2g1%
Protein 30g60%
Vitamin A 30IU1%
Vitamin C 0.3mg0%
Calcium 15mg2%
Iron 4.2mg23%
* Percent Daily Values are based on a 2000 calorie diet.