Flank Steak on the Grill Recipe: Smoky Char and Sliceable Tenderness

There’s nothing like the aroma of flank steak sizzling over open flames to signal a perfect cookout. This method delivers tender results with a smoky char that’s hard to resist.

I’ve perfected the timing and temperature to ensure each bite stays juicy. The key is a hot grill, proper seasoning, and letting the meat rest before slicing thinly against the grain.

Ingredients for Flank Steak on the Grill

Simple ingredients for maximum flavor on the grill.

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Flank steak quality is paramount. Look for well-marbled cuts with vibrant color—avoid anything gray or dried out. Costco has excellent pre-portioned options, but your local butcher can provide custom thickness. The steak should be about 1 inch thick for even cooking. Don’t skip the resting time; it’s essential for tenderness and juiciness.

No smoked paprika? Regular paprika plus a pinch of cayenne works in a pinch. Garlic salt can replace garlic powder, but reduce the added salt by half. Fresh garlic and onion can be used instead of powders—just mince finely. The lime juice is non-negotiable for brightness, but lemon works too. For extra smokiness, add a dash of liquid smoke to the rub.

Steak keeps in the fridge for 2-3 days before cooking. Leftovers? Slice thin and use in tacos or salads. They’ll keep for 4-5 days refrigerated. For freezing, wrap tightly in plastic and foil—good for up to 3 months.

Step-by-Step Instructions for Grilled Flank Steak

This method ensures maximum flavor and that perfect tender bite every time.

Step 1: Season the Flank Steak Generously

Pat the 2 lb Flank Steak dry with paper towels to ensure a good sear. In a small bowl, combine the 2 tsp Kosher Salt, 1.5 tsp Black Pepper, 1 tsp Garlic Powder, 1 tsp Onion Powder, and 1 tsp Smoked Paprika.

Rub this spice mixture evenly over both sides of the steak, pressing it into the meat so it adheres well. The spices should create a visible, even crust on the surface. Let the seasoned steak sit at room temperature for 30 minutes to allow the salt to penetrate and the meat to cook more evenly.

Step 2: Prep the Grill and Sear the Steak

Preheat your grill to high heat (about 450-500°F). While the grill heats, brush the steak lightly with 2 tbsp Olive Oil to prevent sticking and promote a beautiful char. Clean and oil the grill grates thoroughly to ensure clean grill marks.

Place the steak on the grill and sear for 4-5 minutes per side for medium-rare, or until a meat thermometer inserted into the thickest part reads 130-135°F. You’ll see deep grill marks forming, and the edges will start to caramelize. Resist the urge to move the steak—this ensures a proper crust.

Step 3: Rest and Slice Against the Grain

Transfer the steak to a cutting board and tent loosely with foil. Let it rest for 10 minutes—this allows the juices to redistribute, ensuring every slice is juicy and flavorful. During this time, the internal temperature will rise slightly to reach the ideal 145°F for medium-rare.

While the steak rests, thinly slice the 0.5 whole Red Onion and 1 whole Jalapeño (seeds removed). Chop the 0.25 cup Fresh Cilantro. Slice the steak thinly against the grain at a slight angle for maximum tenderness. The grain runs lengthwise in flank steak, so slicing perpendicular to those lines shortens the muscle fibers for easier chewing.

Step 4: Finish with Fresh Toppings

Arrange the sliced steak on a serving platter. Drizzle evenly with 2 tbsp Fresh Lime Juice for a bright, tangy finish. Scatter the sliced red onion, jalapeño, and chopped cilantro over the top for freshness and a pop of color.

This combination of smoky char, tender meat, and zesty toppings creates a balanced, restaurant-quality dish. Serve immediately while warm, with any accumulated juices spooned over the top for extra flavor.

Essential Equipment for Great flank steak on the grill

Grill Essentials

For perfect grill marks, I swear by my Weber Spirit II E-310 gas grill—it heats evenly and maintains 450-500°F without fluctuations. A cast iron grate upgrade gives better searing than stainless steel. 🔥

Precision Tools

Never guess temperatures—my ThermoWorks Instant Read thermometer is always in my apron pocket. For flipping, I use 12-inch tongs from OXO—long enough to keep hands safe from the heat.

Prep Helpers

A basting brush with heat-resistant silicone bristles applies oil evenly without melting. I keep a small bowl of olive oil nearby for quick dips between bastings.

Resting Setup

After grilling, transfer to a bamboo cutting board—it won’t dull knives like plastic. A foil tent keeps the steak warm during the crucial 10-minute rest before slicing.

Safety First

Always have a grill brush with brass bristles (safer than metal) and a fire extinguisher within reach. I learned this the hard way at my first local BBQ competition.

Cleanup Made Easy

A grill mat from Grillaholics catches drippings and makes post-cookout cleanup a breeze. Just wipe it down with a damp cloth after it cools.