How To Cook Flank Steak In Oven

ByLily

Using an oven for flank steak means you can walk away while it roasts, though a quick sear beforehand improves the crust. If you want to know how to cook flank steak in oven style, the method is simpler than you might think. This cut is lean, flavorful, and cooks fast when you use the right temperature.

Flank steak comes from the abdominal muscles of the cow. That means it has long, tough fibers and very little fat. High heat and quick cooking keep it tender. Low and slow makes it chewy.

The oven gives you consistent heat. A skillet gives you a browned surface. Combine both and you get the best of each. Below is a full guide, from picking the meat to slicing it against the grain.

What You Need Before You Start

Gather your tools and ingredients first. This keeps the process smooth.

  • One flank steak, about 1.5 to 2 pounds
  • Olive oil or another high-smoke-point oil
  • Kosher salt and black pepper
  • An oven-safe skillet, preferably cast iron
  • A meat thermometer
  • A cutting board with a juice groove
  • Aluminum foil for resting

A cast iron pan works best because it holds heat well. If you dont have one, any heavy oven-safe skillet will do.

How To Cook Flank Steak In Oven

This is the core method. Follow these steps in order.

Step 1: Preheat The Oven And Pan

Set your oven to 425°F (220°C). Place your cast iron skillet on the middle rack while the oven heats. A hot pan is key for a good sear.

Let the pan heat for at least 15 minutes. It should be smoking slightly when you pull it out.

Step 2: Season The Steak

Pat the steak dry with paper towels. Moisture steams the meat instead of browning it.

Rub both sides with a little oil. Then season generously with salt and pepper. You can add garlic powder or smoked paprika if you like.

Let the seasoned steak sit at room temperature for 20 to 30 minutes. Cold meat cooks unevenly.

Step 3: Sear On The Stovetop

Carefully move the hot skillet to your stovetop over medium-high heat. Lay the steak in the pan away from you to avoid splatter.

Sear for 2 minutes without moving it. Flip and sear the other side for 2 more minutes. You want a deep brown crust.

Step 4: Transfer To The Oven

Put the whole skillet into the preheated oven. Roast for 6 to 8 minutes for medium-rare.

Use your thermometer to check doneness. Insert it into the thickest part, away from bone or fat.

  • Rare: 120°F to 125°F
  • Medium-rare: 130°F to 135°F
  • Medium: 140°F to 145°F
  • Well-done: 155°F and up

Flank steak is best at medium-rare. Going past medium makes it tough.

Step 5: Rest The Meat

Move the steak to a cutting board. Tent it loosely with foil. Let it rest for 10 minutes.

Resting lets the juices redistribute. If you cut too soon, the juice runs out and the meat dries.

Step 6: Slice Against The Grain

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

Cut perpendicular to those lines. Thin slices, about 1/4 inch thick. This shortens the tough fibers and makes each bite tender.

Tips For Better Results

Small changes make a big difference with this cut.

  • Dont skip the sear. It adds flavor and texture.
  • Use a thermometer. Guessing leads to overcooked meat.
  • Slice thin. Thick slices stay chewy.
  • Let the steak rest. This step is not optional.
  • Marinate if you have time. Even 30 minutes helps.

Should You Marinate Flank Steak?

You can. A simple mix of soy sauce, olive oil, garlic, and lemon juice works well. Marinate for 2 to 24 hours in the fridge.

But a dry rub with salt and pepper also works. The oven method shines either way.

What Temperature Is Best?

425°F is the sweet spot. It is hot enough to finish cooking quickly without burning the crust. Lower temps, like 350°F, take longer and can dry out the meat.

Common Mistakes To Avoid

These are the errors that ruin flank steak.

  1. Cutting with the grain instead of against it.
  2. Skipping the rest time.
  3. Overcooking past medium.
  4. Using a dull knife, which tears the meat.
  5. Not drying the steak before searing.

Each one is easy to fix. Pay attention and your steak will be tender.

Serving Ideas

Flank steak is versatile. Serve it sliced over a salad, in tacos, or with roasted vegetables.

It also works great in sandwiches the next day. Cold flank steak keeps its shape well.

Pair it with chimichurri, a simple salsa, or a squeeze of lime. Keep sides light so the beef stands out.

Final Thoughts

Oven cooking gives you a hands-off way to make flank steak. The sear adds crust. The oven finishes the job. Rest and slice correctly, and you get tender results every time.

Try this method once and you will likely use it again. It is fast, reliable, and works for weeknights or guests.

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