How To Cook A London Broil In An Oven

ByLily

Cooking London broil in an oven lets you control the heat precisely, resulting in a tender roast that slices beautifully against the grain. If you want to know how to cook a london broil in an oven, the process is simpler than most people think. You just need the right cut, a hot pan, and a good meat thermometer.

London broil is actually not a cut of meat. It is a cooking method. Most grocery stores sell top round, bottom round, or flank steak under this name. These cuts are lean and can get tough if you cook them wrong. The oven helps you avoid that problem.

What You Need Before You Start

Gather your tools and ingredients first. This keeps the process smooth once the meat hits the heat.

  • A London broil cut, about 1.5 to 2 pounds
  • Kosher salt and black pepper
  • Olive oil
  • A cast iron skillet or heavy oven-safe pan
  • An instant-read meat thermometer
  • Aluminum foil
  • A cutting board with a juice groove

You also want a marinade or dry rub. Both work well. A simple mix of soy sauce, garlic, and oil adds flavor without hiding the beef taste.

How To Cook A London Broil In An Oven

This method uses a hot skillet and a hot oven. It gives you a browned crust and an even interior. Follow these steps in order.

Step 1: Bring The Meat To Room Temperature

Take the steak out of the fridge 30 to 40 minutes before cooking. Cold meat cooks unevenly. Pat it dry with paper towels so the surface browns instead of steaming.

Step 2: Season Or Marinate The Beef

If you are marinating, do it for at least 4 hours or overnight in the fridge. If you are short on time, season generously with salt and pepper right before cooking. Let the salt sit for 15 minutes.

Step 3: Preheat The Oven And The Pan

Set your oven to 425°F (220°C). Place your cast iron skillet inside while the oven heats. A screaming hot pan is the secret to a good sear. Let it sit in there for at least 15 minutes.

Step 4: Sear The Meat On The Stovetop

Carefully move the hot skillet to your stovetop over high heat. Add a tablespoon of oil. It should shimmer right away.

  1. Place the London broil in the pan.
  2. Do not move it for 2 to 3 minutes.
  3. Flip it once and sear the other side for 2 minutes.

You want a deep brown crust on both sides. This builds flavor that the oven alone cannot give you.

Step 5: Move The Pan To The Oven

Slide the whole skillet into the oven. Roast until the internal temperature hits your target.

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

For a 1.5 pound roast, this usually takes 10 to 15 minutes. Start checking at 8 minutes. Ovens vary, so trust the thermometer, not the clock.

Step 6: Rest The Meat

This step matters more then people think. Move the steak to a cutting board. Tent it loosely with foil. Let it rest for 10 minutes. The juices need time to settle back into the meat. If you cut too soon, the juice runs out and you get a dry roast.

Step 7: Slice Against The Grain

Find the lines running across the surface of the meat. Those are the muscle fibers. Cut perpendicular to them, not parallel. Slice thin, about 1/4 inch thick. This shortens the tough fibers and makes every bite tender.

Tips For A Tender London Broil

Lean cuts dry out fast. A few small habits make a big difference.

  • Do not skip the rest time. Ten minutes minimum.
  • Use a thermometer. Guessing leads to overcooked beef.
  • Slice thin. Thick slices of round steak feel chewy.
  • Marinade with acid. Lemon juice, vinegar, or wine helps break down fibers.
  • Do not overcook. Medium rare is the sweet spot for this cut.

If your roast comes out tough anyway, it was likely cooked past medium. You can still use the leftovers in soups or stir fries, but next time pull it from the oven sooner.

Common Mistakes To Avoid

Most bad London broils fail for the same reasons. Watch out for these.

  1. Putting cold meat in the oven. It cooks unevenly.
  2. Skipping the stovetop sear. You lose the crust.
  3. Cutting with the grain. This makes the meat stringy.
  4. Not letting the pan get hot enough. A warm pan steams the meat.
  5. Relying on cook time instead of temperature.

Serving Ideas

London broil pairs well with simple sides. Try roasted potatoes, green beans, or a crisp salad. The leftover slices make great sandwiches the next day. Store them in the fridge for up to 3 days.

Now you know how to cook a london broil in an oven without drying it out. Hot pan, hot oven, quick cook, long rest. That is the whole formula. Once you nail it, this becomes one of the easiest weeknight dinners you can make.

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