Flat Iron Steak Recipes: A Juicy, Simple Skillet Steak

This flat iron steak recipe sears a well-marbled cut of beef in a hot skillet, then finishes it with butter, garlic, and thyme. It makes a flavorful, tender main dish with straightforward prep, and the same method works on a grill when you want a little smoky char.

Ingredients

1½ lb (680 g) flat iron steak, about 1 inch (2.5 cm) thick
1 tbsp (15 ml) olive oil or another neutral, high-heat cooking oil
1 tsp (5 g) kosher salt
½ tsp (1 g) freshly ground black pepper
1 tbsp (14 g) unsalted butter
2 garlic cloves (about 6 g), lightly crushed and peeled
2 fresh thyme sprigs, about 4 inches (10 cm) each
1 tsp (5 ml) lemon juice, optional, for serving

Instructions

Prepare the steak and aromatics. Pat the steak thoroughly dry on both sides with paper towels; a dry surface browns more effectively than a damp one. If it has a thick strip of silvery membrane, trim that away with a sharp knife, taking care not to remove the meat. Measure the salt and pepper, crush the garlic cloves, and set the butter and thyme near the stove so they are ready when needed.
Season and heat the pan. Sprinkle the salt and pepper evenly over both sides of the steak, pressing them on lightly. Set a heavy skillet, preferably cast iron or stainless steel, over medium-high heat for 2 to 3 minutes. The pan should be hot before the meat goes in. Add the oil and swirl to coat the bottom; it should shimmer but not smoke heavily.
Sear the first side. Lay the steak in the pan, lowering it away from you to reduce splatter. It should make a clear, lively sizzle. Leave it undisturbed for about 4 minutes so the surface can develop a deep brown crust. If it sticks at first, give it another 30 seconds rather than pulling it up; it will release more readily once the crust forms.
Turn and cook the other side. Flip the steak with tongs and sear the second side for about 3 to 4 minutes. Exact time depends on the steak’s thickness, starting temperature, and your burner, so use time as a guide rather than as a substitute for checking doneness. If the meat is unusually thick, briefly hold its edges against the pan with tongs to brown them too.
Baste with the butter and herbs. Reduce the heat to medium-low. Add the butter, crushed garlic, and thyme to the pan. Once the butter melts and foams, tilt the skillet slightly and spoon the butter over the steak for 1 to 2 minutes, turning the steak once if needed. Keep the garlic in the pan only until fragrant and lightly golden; dark, burnt garlic can taste bitter.
Check the temperature. Insert an instant-read food thermometer from the side into the thickest part of the steak, aiming for the center without touching the pan. USDA FSIS gives whole cuts of beef a safe minimum internal temperature of 145°F (63°C), followed by a 3-minute rest. If the steak has not reached that temperature, continue cooking in short 30- to 60-second intervals, checking again each time. The timing above is a guide, not a guarantee of safe doneness.
Rest, slice, and serve. Transfer the steak to a clean cutting board and rest it for 5 minutes. This meets the required 3-minute rest and gives you time to finish the sides. Slice thinly across the visible grain, which shortens the muscle fibers and makes each piece easier to chew. Spoon a little of the pan butter over the slices and add lemon juice, if using.

Tips

Choose a steak of even thickness. Flat iron steaks vary in shape, but a piece close to 1 inch thick cooks more evenly with this timing. If one end is much thinner, check that end early and move it away from the hottest part of the pan as needed.
Dry the surface well. Moisture creates steam and delays browning. Paper towels are more useful here than adding extra oil; the measured tablespoon is enough to coat the pan.
Use a thermometer, not color alone. The outside can brown before the center reaches the safe minimum, and the center’s appearance is not a dependable temperature check. Insert the thermometer into the thickest section from the side for a more useful reading.
Swap the herbs or butter thoughtfully. Rosemary can replace thyme, but use one small sprig because its flavor is stronger. If using salted butter, reduce the added salt slightly. A neutral oil such as avocado or canola oil can replace olive oil without changing the basic method.

Serving Suggestions

Serve the steak as soon as it has rested, with its slices arranged on a warm platter and the garlic butter spooned over the top. Mashed potatoes, roasted potatoes, or crispy oven fries are hearty choices that catch the buttery juices. For a lighter plate, pair it with a green salad, sautéed green beans, roasted asparagus, or simply dressed leafy greens. A squeeze of lemon can brighten the rich pan sauce, while a little chopped parsley adds fresh color if you have it.

For a casual dinner, serve the sliced steak with warm tortillas, sliced avocado, salsa, and lime wedges so everyone can assemble their own plates. It also works well over rice, polenta, or a grain bowl with vegetables. If you are serving several sides, slice the steak just before bringing it to the table; leaving it whole until then helps keep the cut surface from cooling and drying out too soon.

Variations

Grilled flat iron steak: Heat a clean grill to medium-high and oil the grates lightly. Pat and season the steak as directed, then grill it for about 4 to 5 minutes per side, adjusting for thickness and checking the thickest part with a food thermometer. Add the butter, garlic, and thyme to a small heatproof pan on the grill or melt them separately on the stove; spoon the mixture over the rested, sliced steak. Grills vary, so rely on the thermometer rather than a fixed time.

Peppery pan sauce: After transferring the cooked steak to rest, carefully pour off excess fat if there is a lot in the skillet. Add ½ cup (120 ml) beef broth and 1 tsp (5 ml) Dijon mustard to the pan, scraping up browned bits with a wooden spoon. Simmer for 2 to 3 minutes until lightly reduced, then take the pan off the heat and swirl in 1 tbsp (14 g) cold butter. Spoon the sauce over the slices.

Chimichurri-style finish: Instead of basting with garlic butter, serve the steak with a quick herb sauce made from ½ cup (15 g) finely chopped parsley, 2 tbsp (30 ml) olive oil, 1 tbsp (15 ml) red wine vinegar, 1 small minced garlic clove, and a pinch of salt. Stir the ingredients together while the steak cooks. This bright, tangy topping changes the flavor direction and is especially good with grilled steak.

Garlic-free version: Leave out the garlic and use the butter with thyme alone. You can also finish with a pinch of smoked paprika or a small spoonful of prepared horseradish at the table. Add stronger seasonings sparingly so they complement the beef instead of covering its flavor.

Storage and Reheating

Refrigerate leftover steak within 2 hours of cooking, storing it in a covered, shallow container. It keeps for 3 to 4 days in the refrigerator. For the best texture, store any extra pan butter separately if practical, and keep the steak in larger pieces rather than slicing all of it in advance. You can freeze cooked steak in a tightly sealed freezer-safe container for about 2 to 3 months for best quality; thaw it in the refrigerator before reheating.

Reheat only the amount you plan to eat. Place slices in a covered skillet with a tablespoon or two of broth or water and warm gently, turning once, until the leftovers reach 165°F (74°C). Check with a food thermometer. You can also reheat larger pieces in a covered oven-safe dish at 300°F (150°C) with a splash of broth, checking the center and removing the meat once it reaches 165°F (74°C). Reheating steak repeatedly can make it dry, so avoid warming the whole batch more than once.

Frequently Asked Questions

What is flat iron steak?
Flat iron steak is a boneless cut from the shoulder, also called the chuck. It is known for good marbling and a relatively tender texture when sliced across the grain. A butcher removes the central connective tissue from the top blade to produce the flat iron cut; if that membrane is still present, trim it before cooking.

Is flat iron steak the same as flank or skirt steak?
No. They are different cuts with different shapes and textures. Flat iron comes from the shoulder and is generally thicker and more evenly shaped than flank or skirt steak. All three benefit from being sliced across the grain, but the cooking time will vary with the cut’s thickness, so check each steak with a thermometer.

Can I cook flat iron steak without a cast-iron skillet?
Yes. A heavy stainless-steel skillet works well, and you can grill the steak using the variation above. A thin pan may lose heat when the cold meat is added, which can make browning less even; if that is what you have, preheat it thoroughly and avoid cooking more than one steak at a time.

How do I know which way to slice it?
Look for the long lines in the cooked meat; those are the muscle fibers, or grain. Slice across those lines rather than parallel to them, making thin slices about ¼ inch (6 mm) thick. If the grain changes direction across the steak, turn the piece as you slice so each section is cut across its own grain.

Can I season the steak ahead?
You can salt it shortly before cooking, as in this recipe, or season it up to a few hours ahead and keep it covered in the refrigerator. Pat away any moisture on the surface before searing. Do not leave raw steak at room temperature for an extended period; keep it refrigerated until you are ready to cook.

Why is my flat iron steak tough?
Common causes include slicing with the grain, cooking the steak well beyond the safe minimum, or using a piece with a remaining strip of connective tissue. Slice thinly across the grain and check the temperature in the thickest part instead of extending the cooking time by guesswork. Resting for at least 3 minutes is also important before slicing.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).