Scrumptious Grilled Lime Marinated Flat Iron Steak

Let me tell you something about flat iron steak. It’s one of the most underrated cuts of beef out there. It’s the second most tender cut after tenderloin, but it costs about half as much. And when you marinate it in bright, zesty, savory flavors? Forget about it.

This Grilled Lime Marinated Flat Iron Steak is my go-to when I want something that tastes like a restaurant but takes almost no effort. The marinade is simple – lime juice, soy sauce, green onions, fresh ginger, and red pepper flakes. The steak marinates for as little as 30 minutes or as long as overnight. Then you grill it hot and fast, let it rest, and slice it thin across the grain.

The result is tender, juicy, tangy, slightly spicy, and packed with flavor.

Serve it with Cuban Style Black Beans and Rice, or just eat it straight off the cutting board. No judgment.

Let’s fire up the grill.

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Why You’ll Love the Recipe

• Flat iron steak is affordable. Second most tender cut. Half the price of tenderloin.
• 30 minute marinade. Or overnight for deeper flavor.
• Bright, zesty, savory. Lime, soy, ginger, green onion, red pepper flakes.
• Grills in 6-8 minutes. Fast enough for a weeknight.
• Rest 10 minutes, slice thin. The key to tender steak.
• Perfect for meal prep. Slice it up. Eat on salads, rice bowls, or tacos all week.
• No fancy equipment. Outdoor grill, contact grill, or indoor grill pan all work.

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What You’ll Need to Make

You’ll need a resealable plastic bag (Ziploc), a dish to protect against leakage, a grill or grill pan, tongs, a sharp knife for slicing, and a cutting board.

Ingredients (Serves 4):

For the marinade:

• ⅓ cup lime juice (about 4 limes)
• 2 tbsp soy sauce
• 2 green onions, thinly sliced (about ⅓ cup)
• 2 tbsp minced fresh ginger
• ½ tsp red pepper flakes

For the steak:

• 1.5 lb flat iron steak
• Vegetable oil for grates or grill pan
• Coarse salt and fresh ground pepper (to taste)

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What You’ll Need to Do

Prep Time: 30 mins (marinate) | Cook Time: 10 mins | Serves: 4

Alright, let’s make a steak that’ll make you feel like a grill master.

⇒ First, make the marinade. In a resealable plastic bag, combine the lime juice, soy sauce, thinly sliced green onions, minced fresh ginger, and red pepper flakes.

⇒ Now prep the steak. Lightly score the steak in a cross-hatch pattern on both sides. This helps the marinade penetrate deeper. Don’t cut all the way through – just shallow cuts.

⇒ Add the steak to the bag. Press out all the air and seal it tight. Place the bag in a dish to catch any leaks. Marinate for at least 30 minutes at room temperature, or overnight in the refrigerator. Overnight is better.

⇒ When you’re ready to cook, heat your outdoor grill, contact grill, or indoor grill pan to medium-high. Lightly oil the grates or grill pan. This prevents sticking.

⇒ Remove the steak from the marinade. Let the excess marinade drip off. Pat the steak dry with a paper towel. This is important – moisture prevents browning.

⇒ Season both sides generously with coarse salt and fresh ground pepper.

⇒ Place the steak on the grill. Cover and cook, turning once, until the meat reaches your desired doneness. For medium rare, 6-8 minutes total depending on thickness. Use a meat thermometer if you have one – 130°F for medium rare.

⇒ Remove the steak from the grill. Let it rest for 10 minutes. Do not skip this. Resting lets the juices redistribute.

⇒ Slice thin across the grain. Cutting against the grain shortens the muscle fibers, making each bite tender.

⇒ Serve immediately. With Cuban Style Black Beans and Rice if you want the full experience. Or just eat the steak. Your call.

⇒ Enjoy with a fork. Or your hands. No judgment.

Easy Ingredient Swaps

• No flat iron steak? Use flank steak, skirt steak, or sirloin. Adjust cooking time for thickness.
• No lime juice? Use lemon juice. Different but still bright and tangy.
• No soy sauce? Use tamari (gluten free) or coconut aminos.
• No fresh ginger? Use 1 tsp ground ginger. Fresh is better, but dried works.
• No red pepper flakes? Use cayenne pepper or a dash of hot sauce.
• No green onions? Use ¼ cup finely chopped red onion or shallot.
• No grill? Use a cast iron skillet on the stovetop. High heat. Good ventilation.

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Some Twist and Tweak Ideas

• Spicy version: Double the red pepper flakes. Add a minced jalapeño to the marinade.
• Garlic lime: Add 4 cloves minced garlic to the marinade.
• Cilantro version: Add ¼ cup chopped fresh cilantro to the marinade.
• Honey lime: Add 1 tbsp honey to the marinade. Sweet and tangy.
• Orange ginger: Swap lime juice for orange juice. Different citrus, same vibe.
• Sesame version: Add 1 tbsp sesame oil and 1 tbsp sesame seeds to the marinade.
• Cuban style: Add 1 tsp cumin and 1 tsp oregano to the marinade. Serve with black beans and rice.

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Some Helpful Tips

• Score the steak. Shallow cuts in a cross-hatch pattern help the marinade penetrate deeper. Don’t cut all the way through.
• Pat the steak dry before grilling. Excess marinade = steam = no browning. Dry steak = good sear.
• Let the steak rest for 10 minutes. This is non-negotiable. Resting lets the juices redistribute. Cut too soon and all the juice ends up on the cutting board.
• Slice thin across the grain. Look at the direction of the muscle fibers. Slice perpendicular to them. This makes the steak tender, not chewy.
• Use a meat thermometer. 130°F for medium rare. 140°F for medium. 150°F for well-done (please don’t).
• Don’t skip the 30 minute marinade. 30 minutes is the minimum. Overnight is better. The lime juice tenderizes the meat.

Some Budget-Friendly Tips

• Flat iron steak is a bargain. Second most tender cut. Half the price of tenderloin. Ask your butcher if you don’t see it.
• Limes on sale. 4 limes for ⅓ cup juice. Buy a bag when they’re cheap.
• Fresh ginger is cheap. One root costs pennies. Store leftover ginger in the freezer. Grate it frozen.
• Soy sauce lasts forever. A bottle will last for months of marinades and stir-fries.
• Green onions from the garden. Or buy a bunch. Use the whites in the marinade, save the greens for garnish.
• Make a double batch. Marinate two steaks. Grill one. Freeze the other in the marinade. Dinner ready for another night.

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Some Serving Ideas

• As a main course. Serve with Cuban Style Black Beans and Rice. Classic pairing.
• In tacos. Slice the steak thin. Serve in corn tortillas with avocado, onion, cilantro, and lime.
• On a salad. Room temperature steak over mixed greens with avocado, corn, black beans, and a lime vinaigrette.
• In a rice bowl. Steak over rice (or cauliflower rice) with black beans, corn, avocado, and salsa.
• For meal prep. Slice the steak. Portion into containers with rice and veggies. Lunch for days.
• On a sandwich. Pile sliced steak on a toasted baguette with aioli and arugula.

Some Storage and Reheating Tips

Fridge (cooked steak): Store in an airtight container for up to 4 days. Slice before storing for easy grabbing.

Freezer (uncooked, in marinade): Freeze in the marinade in a resealable bag for up to 3 months. Thaw overnight in the fridge. Grill as directed.

Freezer (cooked steak): Freeze sliced cooked steak for up to 2 months. Thaw overnight in the fridge.

Reheating cooked steak:

• Microwave (fast but not great): 45-60 seconds. Steak gets chewy.
• Skillet (best): Reheat over medium heat for 1-2 minutes per side. Add a splash of water or broth to keep it moist.
• Air fryer: 350°F for 2-3 minutes.
• Eat cold: Sliced steak is delicious cold straight from the fridge. Great on salads.

Do not reheat more than once. Take out only what you’ll eat.

Final Thoughts

Look, I love a fancy ribeye as much as the next guy. But for a weeknight dinner when I want something delicious without spending a fortune? Flat iron steak is my secret weapon.

It’s tender. It’s affordable. And when you marinate it in lime, soy, ginger, and red pepper flakes? It’s unforgettable.

The marinade takes 2 minutes to whisk together. The steak needs at least 30 minutes to soak up all that flavor. Then 6-8 minutes on a hot grill. Then 10 minutes of rest (do not skip). Then slice thin across the grain and serve.

That’s it. That’s the whole recipe.

Make it for a weeknight dinner. Make it for a summer cookout. Make it for meal prep. However you serve it, you’re getting a steak that tastes like you spent way more time and money than you actually did.

Now go marinate some steak.

~ Danny Davis

P.S. If you try the garlic lime version, let me know. That’s my go-to when I want even more punch. Four cloves of garlic. Trust me. It’s worth it.