How To Cook A Beef Flank Steak In The Oven

ByLily

Flank steak in the oven works best when you broil it fast and slice it against the grain. If you want to know how to cook a beef flank steak in the oven, the short answer is high heat, a hot pan, and a quick rest before slicing.

This cut is lean and full of beef flavor. It does not need long, slow cooking. In fact, long cooking makes it tough. A fast broil in the oven gives you a juicy inside and a nicely browned outside.

Below you will find a simple method, timing tips, and a marinade that works every time.

What You Need Before You Start

Flank steak is thin, usually about one inch thick. That shape is perfect for oven broiling. Gather these items first so you are not searching for tools mid-cook.

  • One beef flank steak, about 1.5 to 2 pounds
  • A rimmed baking sheet or a cast iron skillet
  • Aluminum foil for easy cleanup
  • Tongs for flipping
  • A sharp knife for slicing
  • A cutting board with a groove to catch juices
  • An instant-read thermometer

You also need a little oil and salt. That is it. Simple is better here.

How To Cook A Beef Flank Steak In The Oven

This is the core method. Follow these steps in order and you will get a tender, flavorful steak.

Step 1: Prep The Oven And Pan

Move your oven rack to the top position, about 4 to 5 inches from the broiler element. Turn the broiler on high. Place a dry cast iron skillet or a foil-lined baking sheet in the oven while it heats. A hot pan gives the steak a head start on browning.

Step 2: Season The Steak

Pat the steak dry with paper towels. Moisture steams the meat instead of searing it. Rub both sides with a little oil, then season generously with salt and pepper. If you have time, let it sit at room temperature for 20 minutes.

Step 3: Sear On The Stovetop (Optional But Recommended)

For the best crust, heat a skillet on the stove over high heat. Add a teaspoon of oil. Sear the steak for 1 to 2 minutes per side. You are not cooking it through, just building color. Skip this step if you want a pure oven method, but add 2 minutes to the broil time.

Step 4: Broil In The Oven

Place the steak on the hot pan and slide it under the broiler. Cook for 3 to 4 minutes. Flip with tongs and cook another 3 to 4 minutes for medium-rare. The internal temperature should read 130 to 135 degrees Fahrenheit for medium-rare, or 140 to 145 for medium.

Thin steaks cook fast. Check at the 3-minute mark on the second side. Overcooking is the main reason flank steak turns tough.

Step 5: Rest The Meat

Move the steak to a cutting board. Loosely tent it with foil. Let it rest for 5 to 10 minutes. This lets the juices settle back into the meat instead of running out onto the board.

Step 6: Slice Against The Grain

This step matters more than any other. Look at the surface of the steak. You will see long lines of muscle fiber. Cut across those lines, not along them. Hold your knife at a slight angle and slice thin pieces, about 1/4 inch thick. Short fibers chew easy. Long fibers feel tough.

Simple Marinade For Extra Flavor

A marinade is not required, but it adds flavor and helps tenderize the surface. Mix these in a small bowl or zip bag.

  • 1/4 cup soy sauce
  • 2 tablespoons olive oil
  • 2 tablespoons fresh lime juice
  • 2 cloves garlic, minced
  • 1 teaspoon honey
  • 1/2 teaspoon black pepper

Marinate the steak for 30 minutes to 2 hours in the fridge. Do not go longer than 4 hours. The acid in the lime can make the texture mushy. Pat it dry before cooking so it browns well.

Common Mistakes To Avoid

Most flank steak problems come from a few easy-to-fix errors.

  • Slicing with the grain instead of against it
  • Cooking past medium doneness
  • Skipping the rest time
  • Using a dull knife that tears the meat
  • Crowding the pan so the steak steams

Fix these and your steak will be tender every time.

What To Serve With Flank Steak

Flank steak pairs well with simple sides. Try roasted potatoes, grilled vegetables, a green salad, or warm tortillas for fajitas. The leftovers are great cold on a sandwich or sliced over rice.

Storing And Reheating Leftovers

Keep leftover steak in an airtight container in the fridge for up to 3 days. Reheat gently in a skillet over low heat for 1 to 2 minutes per side. A microwave works but can dry it out. Cold slices are often better than reheated ones.

Now you have a clear plan. Hot oven, quick broil, short rest, and thin slices against the grain. That is the whole secret to a tender flank steak. Try it once and you will keep this method handy.

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