Thanks to a bold soy-lime marinade, quick cooking time, and a few simple techniques, this marinated flank steak grills up incredibly juicy, tender, and packed with flavor.
In a large shallow dish or glass measuring cup, whisk together ¼ cup olive oil, ¼ cup lime juice, ¼ cup low sodium soy sauce, ¼ cup brown sugar, 2 tablespoons minced garlic, ½ tablespoon grated ginger root, 1 teaspoon onion powder, ½ teaspoon crushed red pepper flakes, and a pinch of black pepper until combined.
Pat the flank steak dry with a paper towel to remove excess moisture. Then this is optional, but strongly encouraged, using a sharp knife, make shallow cuts across steak in about 1-inch intervals. Repeat the opposite direction, to create a diamond-shaped pattern. Don't cut through the steak, you just want to break the surface to allow the marinade to penetrate the meat as best as it can.
Place the steak into the shallow dish with the prepared marinade, or into a large storage bag and pour the marinade over the steak. Toss to coat the steak evenly in the marinade.
Cover and refrigerate for at least 2 hours or up to 8 hours, turning the steak once or twice during the process.
When ready to grill, lightly grease the grates of a grill or grill plate with oil then preheat to medium-high.
Remove the steak from the marinade, letting the excess drip into the bowl or bag. Place the marinated flank steak on the grill and grill for 4-5 minutes per side, for medium-rare or an internal temperature of 128-130℉. (It will continue to rise in temp as it rests).
Transfer the grilled steak to a cutting board, tent with foil, and rest for 5-10 minutes.
Once rested, slice the steak thinly on an angle against the grain for the most tender results.
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Notes
Olive Oil: I recommend using refined light olive oil over extra virgin olive oil as it has a higher smoke point that is ideal for grilling.Soy Sauce: Use Tamari or gluten-free soy sauce to keep this recipe gluten-free. Crushed Red Pepper Flakes: Omit, increase, or decrease as desired to control the spice level.Broil vs. Grill: Broil the steak on a foil-lined baking sheet about 4-6 inches from the broiler for roughly 4-5 minutes per side, or until it reaches 128-130°F. Rest and slice as directed.Freeze Before Marinating: Add the scored flank steak and marinade directly to a freezer-safe bag and freeze immediately for up to 2 months. Let thaw in the refrigerator for 16-24 hours, then plan to cook immediately.