Barbecue Flank Steak Recipe: Smoky Char With Juicy Slices

Getting my first whiff of hickory smoke at a backyard cookout hooked me on the art of barbecue. This flank steak delivers juicy slices with a perfect char every time.

My French training taught me that a simple marinade and precise grilling technique elevate good meat to great. The result is tender, flavorful steak with that coveted smoky crust.

Ingredients for Barbecue Flank Steak

Simple marinade transforms flank steak into juicy, smoky perfection every time.

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The steak is everything here. Flank steak needs to be about 1 inch thick for even cooking—too thin and it dries out. Look for good marbling at Whole Foods or Costco. I always grab mine from the butcher counter if available (they’ll trim the fat for you). Hickory wood chips add that authentic smoky flavor—Weber makes a solid pre-soaked bag if you’re short on time.

No hickory chips? Mesquite or apple wood both work great—just soak them first. Out of Worcestershire? Extra soy sauce plus a dash of fish sauce (if you have it) gets you close. Brown sugar can be subbed with honey or maple syrup, but cut the amount by half since they’re sweeter. The garlic and ginger are non-negotiable though—they’re what give this that deep, aromatic base.

Marinate the steak for 4-12 hours—overnight if you’ve got the time. Leftovers keep 3-4 days in the fridge, but honestly, it’s best fresh off the grill. Slice against the grain for those perfect tender strips.

Step-by-Step Instructions for Barbecue Flank Steak

Here’s the method I’ve perfected for tender, smoky results every time.

Step 1: Marinate the Flank Steak

In a large bowl, whisk together the 0.5 cup soy sauce, 0.25 cup olive oil, 0.25 cup brown sugar, 2 tbsp apple cider vinegar, and 2 tbsp Worcestershire sauce until the sugar dissolves. This blend creates the perfect balance of sweet, salty, and tangy.

Add the 4 cloves garlic cloves and 1 tbsp fresh ginger to the marinade, then place the 2 lb flank steak in the mixture. Turn to coat evenly, ensuring every surface is covered. Cover and refrigerate for at least 4 hours, but overnight is ideal for maximum flavor penetration.

I always marinate in the fridge to prevent the meat from spoiling. The longer it sits, the more tender and flavorful the steak becomes. Don’t skip this step—it’s what makes the flank steak juicy and packed with flavor.

Step 2: Prepare the Grill and Wood Chips

Soak the 1 cup hickory wood chips in water for 30 minutes before grilling. This prevents them from burning too quickly and produces that perfect smoky flavor. Drain the wood chips just before using.

Preheat your grill to medium-high heat (about 375-400°F). If using a charcoal grill, bank the coals to one side for indirect heat. For a gas grill, turn off one set of burners to create a cooler zone. This setup allows you to sear the steak first, then finish it with indirect heat for even cooking.

Once the grill is hot, add the soaked wood chips directly to the coals or place them in a smoker box for a gas grill. Close the lid and let the smoke build for 5 minutes before adding the steak.

Step 3: Grill the Steak to Perfection

Remove the flank steak from the marinade and pat it dry with paper towels. This helps it sear better on the grill. Season both sides lightly with the 1 tsp kosher salt, 1 tsp black pepper, and 1 tsp smoked paprika—this adds an extra layer of flavor to the crust.

Place the steak on the hot grill directly over the heat. Sear for 4-5 minutes per side to develop a beautiful char. You’ll know it’s ready to flip when it releases easily from the grates and has distinct grill marks.

Move the steak to the cooler side of the grill (indirect heat) and close the lid. Cook for an additional 8-10 minutes, or until the internal temperature reaches 130-135°F for medium-rare. Flank steak is lean, so it’s best served medium-rare to medium to keep it juicy.

Step 4: Rest and Slice for Serving

Transfer the steak to a cutting board and tent loosely with foil. Let it rest for 10-15 minutes before slicing. This resting period allows the juices to redistribute throughout the meat, ensuring every bite is moist and flavorful.

To slice, locate the grain—the long, visible lines running through the meat. Using a sharp knife, slice against the grain at a slight angle into ¼-inch thick strips. Slicing against the grain shortens the muscle fibers, making the steak more tender and easier to chew.

Serve immediately while still warm. The steak should have a smoky aroma, a slightly crispy exterior, and a juicy, tender interior. Any leftovers make fantastic sandwiches the next day!

Health Benefits of This Dish

Lean Protein Power

Flank steak packs a serious protein punch with about 23 grams per 3-ounce serving, making it ideal for muscle maintenance and repair. This lean cut delivers all nine essential amino acids your body needs without excessive saturated fat. 💪

Iron and Zinc Boost

You’ll get a healthy dose of iron and zinc from this dish—about 15% of your daily iron and 30% of zinc per serving. These minerals support immune function and energy levels, which I notice most after a long day at local BBQ competitions.

B Vitamin Rich

This steak is loaded with B vitamins, particularly B12, B6, and niacin. These nutrients help convert food into energy and support a healthy nervous system. A 6-ounce portion provides nearly half your daily B12 needs.

Low Calorie Option

With only about 150 calories per 3-ounce serving before marinade, flank steak is a great choice for weight management. The marinade adds minimal calories while maximizing flavor. I often serve this after my coastal rides when I want a satisfying but lighter meal.

Rich in Selenium

Each serving provides about 25 mcg of selenium, a powerful antioxidant that protects cells from damage. This mineral also supports thyroid function. The soy sauce in the marinade adds a small selenium boost too. 🥩

Heart Healthy Choice

When trimmed of excess fat, flank steak contains less saturated fat than many other cuts. The omega-3 fatty acids present in grass-fed beef support heart health. I always ask my local butcher for well-marbled but lean flank steaks.

Frequently Asked Questions