How To Cook A Flank Steak In The Oven

ByLily

Oven-roasting a flank steak works best when you sear it first and finish it gently under controlled heat. If you want to know how to cook a flank steak in the oven without drying it out, the answer is a hot skillet plus a moderate oven. This method gives you a browned crust and a juicy, sliceable interior every time.

Flank steak is lean and thin, so it cooks fast. That is good news for a weeknight dinner. It also means you need to watch the clock closely. A few extra minutes can push it from tender to tough.

Why The Oven Method Works For Flank Steak

Flank steak comes from the abdominal muscles of the cow. Those muscles do a lot of work, so the meat is flavorful but lean. It has long, visible grains that run the length of the cut.

Cooking it in the oven solves two problems at once. High heat on the stovetop creates browning and flavor. The oven then finishes the meat evenly without scorching the outside.

This two-step approach is often called sear and finish. It is the same technique used for thick steaks in steakhouse kitchens. You can do it at home with one oven-safe pan.

What You Will Need

  • One flank steak, about 1.5 to 2 pounds
  • Kosher salt and black pepper
  • One tablespoon of high-smoke-point oil, like avocado or canola
  • A cast iron skillet or other oven-safe pan
  • A cutting board and a sharp knife
  • An instant-read thermometer
  • Aluminum foil for resting

How To Cook A Flank Steak In The Oven

Follow these steps in order. The whole process takes about 25 minutes, including resting time.

Step 1: Preheat And Prep

Set your oven to 400°F (205°C). Place a rack in the middle position.

Take the steak out of the fridge 20 to 30 minutes before cooking. Room-temperature meat cooks more evenly. Pat it completely dry with paper towels. Moisture on the surface steams the meat instead of searing it.

Season both sides generously with salt and pepper. You can also add garlic powder or smoked paprika if you like.

Step 2: Heat The Pan

Put your cast iron skillet on the stove over medium-high heat. Let it get hot for 3 to 4 minutes.

Add the oil and swirl it around. It should shimmer but not smoke heavily. If it starts smoking hard, lower the heat slightly.

Step 3: Sear Both Sides

Lay the steak in the pan away from you to avoid splatter. Press it down gently with tongs so the whole surface makes contact.

Leave it alone for 2 to 3 minutes. Do not move it. You want a deep brown crust.

Flip once and sear the other side for another 2 minutes.

Step 4: Move The Pan To The Oven

Transfer the skillet directly into the preheated oven. Keep the steak in the pan.

Roast for 5 to 7 minutes for medium-rare. The internal temperature should read 130°F to 135°F on your thermometer.

For medium, aim for 140°F to 145°F, which takes about 7 to 9 minutes. Remember that the temperature will rise another 5 degrees while resting.

Step 5: Rest The Meat

Move the steak to a cutting board. Tent it loosely with foil.

Let it rest for 10 minutes. This step is not optional. Resting allows the juices to redistribute through the meat. Cut too early and the juice runs out onto the board.

Step 6: Slice Against The Grain

Look at the surface of the steak. You will see lines running in one direction. Those are the muscle fibers.

Hold your knife perpendicular to those lines. Cut thin slices, about 1/4 inch thick, at a slight angle.

Slicing against the grain shortens the tough fibers. This single step makes more difference in tenderness than any marinade.

Tips For Better Results

  • Do not skip the rest time. Ten minutes minimum.
  • Use a thermometer instead of guessing by color.
  • Dry the surface of the meat before searing.
  • Do not overcrowd the pan. One steak at a time.
  • Let the pan get hot before adding oil.
  • Slice thinly and always against the grain.

Common Mistakes To Avoid

Overcooking is the biggest problem. Flank steak has little fat, so it dries out fast past medium.

Another mistake is slicing with the grain. This leaves long, chewy strands that are hard to bite through.

Some cooks also skip the sear and put the meat straight in the oven. That works, but you lose the browned crust and much of the flavor.

What To Serve With Flank Steak

The slices work well over rice, in tacos, on salads, or next to roasted potatoes. A simple chimichurri or a squeeze of lime adds brightness.

Leftovers keep in the fridge for 3 to 4 days. Reheat them gently or eat them cold in a sandwich.

Final Thoughts

The key to a great flank steak in the oven is simple. Season it, sear it hard, finish it in a 400°F oven, and pull it at the right temperature.

Rest it, then slice against the grain. Do those things and you will get tender, flavorful results every time, even on a busy weeknight.

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