Marinated Flank Steak with Soy and Garlic

Nothing beats the roar of a piping hot cast iron skillet and the intense sizzle of beef hitting the surface. Searing builds a flavorful crust, while the marinade and cutting against the grain do most of the work of keeping the meat tender.

The aim is to soften the dense, lean fibers of the beef while keeping the exterior firm. This technique results in a rich, savory crust and a moist, juicy center.

This is a simple approach that requires no specialized equipment. With just a bag, a pan, and a bit of time in the fridge, you're set.

Why This Meat Stays Tender

• Acidic Breakdown: The apple cider vinegar breaks down the tough connective tissues in the meat. This is the most effective way to marinate flank steak for tenderness.
• Salt Penetration: A marinated flank steak relies on salt from the soy sauce to draw moisture into the muscle fibers, which keeps it from drying out during the high-heat sear.

The Ingredients

• 1½ lb flank steak
• 1/2 cup low-sodium soy sauce Why this? Adds salt and umami without over-salting the meat
• 1/4 cup olive oil Why this? Helps the steak sear without sticking
• 2 tbsp apple cider vinegar Why this? Provides the acid needed to soften the grain
• 1 tbsp honey Why this? Creates a caramelized crust on the grill
• 3 cloves garlic, minced
• 1 tsp cracked black pepper

Simple Swaps

Recipe Specs

• Prep time: 10 minutes
• Cook time: 10 minutes
• Total time: 4 hours 30 mins
• Yield: 4 servings

Bringing It Together

Preparing the Marinade

In a medium bowl, combine 1/2 cup low-sodium soy sauce, 1/4 cup olive oil, 2 tbsp apple cider vinegar, 1 tbsp honey, 3 cloves minced garlic, and 1 tsp cracked black pepper. Whisk until the honey dissolves and the sauce is fully emulsified.

Marinating the Beef

Place 1½ lb flank steak in a gallon-sized Ziploc bag. Pour in the marinade, press out any air, seal, and refrigerate for 4 to 24 hours. Note: Air bubbles prevent the marinade from touching the meat.

Getting the Heat

Bring a cast iron skillet or grill to high heat until a drop of water dances across the surface. Take the meat from the marinade and pat it dry with paper towels. Note: Wet meat steams instead of searing.

Cooking and Resting

Sear for 4–6 minutes per side until a meat thermometer reads 145°F (63°C) for medium. Shift the meat to a carving board and allow it to rest for 10 minutes to redistribute the juices.

Slicing the Steak

Identify the direction of the muscle fibers and cut the meat perpendicular to the grain into thin slices.

What Can Go Wrong

Fixing Burnt Edges

The honey in this flank steak soy marinade can scorch if the pan is too hot. If the crust turns black before the middle is cooked, move the meat to a cooler spot on the grill or lower the burner slightly.

Avoiding Tough Meat

If the steak feels rubbery, you likely sliced it with the grain instead of against it. Always look for the lines of the muscle and cut across them to shorten the fibers, making every bite easier to chew.

Fixing Cold Centers

Thick cuts of flank steak can stay raw in the middle while the outside burns. Let the meat sit at room temperature for 20 minutes before searing to ensure the heat penetrates evenly.

Steak Myths

Searing meat does not "seal in juices." You lose moisture regardless of the heat, but the crust is there for the flavor and texture. The real way to keep juices inside is the 10-minute rest after cooking.

Storage and Reheating

Keep leftover marinated flank steak in a tight-sealing vessel in the fridge for 3 days. For advance prep, freeze the steak while it is still in its marinade for up to 3 months. Thaw it in the refrigerator overnight before grilling.

When reheating, avoid the microwave to prevent the fibers from toughening. Instead, warm the slices in a pan over medium heat with a splash of beef broth until they reach 165°F (74°C) inside.

Flavor Twists and Swaps

You can tweak this marinated flank steak for different cuisines. To make a version for carne asada, add a squeeze of fresh lime and some chopped cilantro to the bag. For a Ginger-Sesame twist, add 1 tbsp of grated fresh ginger and a dash of toasted sesame oil.

If you want an even deeper flavor profile, you can use a umami bomb marinade as a base for other lean cuts of beef.

What to Serve With It

This steak is a great match for grilled asparagus or a refreshing cucumber salad. For a more substantial meal, try it served over jasmine rice or inside warm corn tortillas with sliced avocado and pickled red onions.

High Sodium Content