Grilled Flank Steak

Name: Grilled Flank Steak
Prep time: 10 min
Cook time: 8 min
Total time: 18 min
Yield: Serves approximately four people
Cuisine: American
Ingredients: 18 oz flank steak; 3 tablespoons avocado oil; 2 tablespoons minced parsley; 2 tablespoons minced cilantro; 2 tablespoons stone ground mustard; 1 tablespoon red apple vinegar; 3 cloves garlic, minced; 1 1/2 teaspoons salt

Published: May 21, 2026

by Amelia

Why You’ll Love This Recipe

Quick Cooking: The grilled flank steak can be ready in just 18 minutes, making it perfect for busy evenings.
Flavorful Marinade: The combination of mustard, herbs, and garlic creates a mouthwatering taste that elevates the dish.
Versatile Dish: Ideal for summer cookouts or weeknight dinners; you can serve it with salads, wraps, or sides.
Keto-friendly: With low carbs and high protein, this recipe fits perfectly into a keto lifestyle.
Easy Cleanup: Cooking on the grill means less mess in the kitchen!

Tools and Preparation

To create the best grilled flank steak, having the right tools is essential. Here’s what you need to get started.

Essential Tools and Equipment

Grill
Large baking dish or Ziploc bag
Small mixing bowl
Whisk
Paper towels
Cutting board

Importance of Each Tool

Grill: A good-quality grill ensures even cooking and adds delicious smoky flavors to your steak.
Whisk: Helps to thoroughly blend ingredients for a smooth marinade that clings well to the meat.

Ingredients

For the Steak Marinade

18 oz flank steak
3 tablespoons avocado oil or neutral oil
2 tablespoons minced parsley
2 tablespoons minced cilantro
2 tablespoons stone ground mustard
1 tablespoon red apple vinegar
3 cloves garlic, minced
1 1/2 teaspoons salt

How to Make Grilled Flank Steak

Step 1: Prepare the Steak

Pat the steak dry with a paper towel on all sides.
Place the steak in a large baking dish, plate, or Ziploc bag.

Step 2: Make the Marinade

In a small bowl, whisk together avocado oil, minced parsley, minced cilantro, stone ground mustard, red apple vinegar, garlic, and salt until well combined.

Step 3: Marinate the Steak

Rub or brush the marinade all over the flank steak.
Allow it to soak in for at least 1-2 hours (up to 8 hours) in the refrigerator.

Step 4: Preheat the Grill

Remove the flank steak from the refrigerator about thirty minutes before cooking to allow it to come to room temperature.
Preheat one side of your grill to high (450 – 500°F).

Step 5: Grill the Steak

Once hot enough, place the flank steak on the hot side of the grill.
Cook until well charred on one side for about 3-5 minutes.
Flip and continue cooking until well charred on the second side for about another 3 minutes.
Transfer to the cooler side of the grill, cover, and cook until reaching an internal temperature of 125°F for medium-rare or 135°F for medium.

Step 6: Rest and Serve

Remove the steak from the grill and transfer it to a cutting board.
Let it rest for at least 5 minutes before slicing against the grain to serve.

Enjoy your delicious grilled flank steak with your favorite sides!

How to Serve Grilled Flank Steak

Grilled flank steak is not only delicious but also versatile. Pair it with various sides or toppings to enhance its flavor and create a delightful meal.

Tacos

Fill soft tortillas with sliced grilled flank steak, fresh cilantro, diced onions, and a squeeze of lime for a quick and tasty taco option.

Salad

Slice the flank steak over a bed of mixed greens, cherry tomatoes, and avocado. Drizzle with a light vinaigrette for a refreshing salad.

Sandwiches

Layer thinly sliced flank steak in a crusty roll with sautéed peppers and onions. Add some mustard or mayo for extra flavor.

Rice Bowls

Serve the grilled steak over steamed rice or quinoa, topped with grilled vegetables and your choice of sauce for a hearty bowl.

Skewers

Cut the flank steak into cubes, marinate, and skewer with bell peppers and onions. Grill until charred for an easy-to-eat finger food.

Stir-Fry

Slice the steak into strips and stir-fry with vegetables like broccoli, carrots, and snap peas. Serve over rice or noodles for a satisfying dish.

How to Perfect Grilled Flank Steak

Achieving perfectly grilled flank steak requires attention to detail. Follow these tips to elevate your cooking game.

Use high heat: Preheating your grill ensures that you get a nice sear on the meat, enhancing flavor and texture.
Marinate properly: Allowing the flank steak to marinate for at least 1-2 hours infuses it with flavor and tenderness.
Let it rest: After grilling, let the steak rest for at least 5 minutes before slicing. This helps retain juices for a more flavorful bite.
Slice against the grain: To maximize tenderness, always cut the steak against the grain when serving.
Monitor internal temperature: Use a meat thermometer to check doneness; aim for 125°F for medium-rare or 135°F for medium.
Experiment with flavors: Don’t hesitate to try different marinades or seasoning blends to find your perfect combination.

Best Side Dishes for Grilled Flank Steak

Complement your grilled flank steak with these delicious side dishes that are sure to impress.

Roasted Vegetables: A mix of seasonal vegetables tossed in olive oil and herbs provides color and nutrition.
Garlic Mashed Cauliflower: A creamy alternative to mashed potatoes that pairs beautifully with steak.
Corn on the Cob: Grilled corn brushed with butter offers sweetness that balances the savory flavors of the meat.
Quinoa Salad: Light yet filling, this salad made with quinoa, cherry tomatoes, cucumber, and feta cheese adds freshness.
Coleslaw: A crunchy slaw made from cabbage and carrots dressed in vinegar adds a tangy contrast to the rich meat.
Baked Sweet Potatoes: Their natural sweetness complements the savory notes of grilled flank steak while providing fiber.
Zucchini Noodles: Lightly sautéed zucchini noodles offer a low-carb option that still delivers on flavor.
French Fries: Classic fries are always a hit; serve them crispy alongside your steak for a comforting meal.

Common Mistakes to Avoid

When grilling flank steak, avoiding common errors can elevate your dish from good to great.

Ignoring the marinade time: Allowing your steak to marinate for less than the recommended time can lead to a bland flavor. Aim for at least 1-2 hours, or up to 8 for deeper flavor.
Cooking straight from the fridge: Cooking your flank steak cold can result in uneven cooking. Let it rest at room temperature for 30 minutes before grilling.
Not preheating the grill: Skipping this step can prevent a good sear. Always preheat your grill to high heat (450–500°F) before placing the meat on it.
Slicing against the grain: Cutting with the grain can make your steak tough. Always slice against the grain for a tender bite.
Not letting it rest: Cutting into your steak immediately after grilling will cause juices to run out, leading to dryness. Allow it to rest for at least 5 minutes before slicing.

Storage & Reheating Instructions

Refrigerator Storage

Store grilled flank steak in an airtight container.
It can last up to 3-4 days in the refrigerator.

Freezing Grilled Flank Steak

Wrap the steak tightly in plastic wrap or aluminum foil before placing it in a freezer bag.
It can be frozen for up to 3 months.

Reheating Grilled Flank Steak

Oven: Preheat to 250°F and place steak on a baking sheet covered with foil until warmed through.
Microwave: Use medium power and cover the steak with a damp paper towel to retain moisture while reheating.
Stovetop: Heat a skillet over low heat and add a splash of broth or water, then warm the steak gently until heated through.

Frequently Asked Questions

Here are some common questions about preparing grilled flank steak.

What is Grilled Flank Steak?

Grilled flank steak is a flavorful cut of beef that becomes tender and juicy when marinated and grilled properly.

How long should I marinate flank steak?

For optimal flavor, marinate flank steak for at least 1-2 hours but no more than 8 hours. This time allows the flavors to infuse deeply into the meat.

What temperature should I cook flank steak?

For medium-rare, aim for an internal temperature of 125°F; for medium, target around 135°F. Use a meat thermometer for accuracy.

Can I use other cuts of beef instead of flank steak?

Yes, you can substitute with skirt steak or sirloin if necessary. However, they may vary slightly in texture and cooking time.

What sides pair well with grilled flank steak?

Fresh salads, roasted vegetables, or quinoa are excellent side dishes that complement grilled flank steak beautifully.

Final Thoughts

This Grilled Flank Steak recipe is not just quick and easy; it’s also packed with flavor thanks to its tangy marinade. It’s versatile enough for weeknight dinners or summer cookouts. You can customize it further by adding different herbs or spices based on your preferences. Give it a try—you won’t be disappointed!

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