Marinating London broil overnight in an acidic mixture helps break down tough muscle fibers for a more tender bite. Learning how to cook london broil correctly can turn an inexpensive cut into a satisfying meal. This guide walks you through every step from selecting the meat to serving it perfectly.
London broil is not actually a specific cut of beef. It is a cooking method usually using top round or flank steak. These cuts come from well-exercised muscles, so they can be tough if not handled right. The key is to cook it quickly to medium-rare and slice it thinly against the grain.
You do not need fancy equipment or rare ingredients. A hot oven or grill, a sharp knife, and a simple marinade are all it takes. Follow these steps and you will get tender, flavorful beef every time.
What Is London Broil Exactly
Many grocery stores label a thick cut of top round as “London Broil.” Butchers often use the name for any large, lean steak suitable for broiling. The term originated in England but became popular in North America as a way to prepare tougher cuts.
The meat is usually 1 to 2 inches thick and weighs between 1 and 2 pounds. It has very little fat marbling, which means it dries out quickly if overcooked. That is why proper technique matters so much.
Choosing The Right Cut
Look for a piece that is uniform in thickness. Uneven cuts cook unevenly, leaving some parts overdone and others undercooked. Top round is the most common choice, but flank steak or sirloin tip also work well.
- Top round: Lean, firm texture, most common
- Flank steak: More flavor, slightly tougher
- Sirloin tip: Tender but less beefy taste
Check the color. Fresh beef should be bright red. Avoid meat that looks brown or has a strong smell. The surface should feel moist but not sticky.
How To Cook London Broil
Now we get to the main event. This section covers the entire process from marinating to resting. Pay attention to the timing and temperature, as these are critical for success.
Step 1: Prepare The Marinade
A good marinade does two things: adds flavor and helps tenderize. Acidic ingredients like vinegar, citrus juice, or wine break down some of the tough connective tissue. Oil helps carry flavors and prevents sticking.
Here is a simple marinade recipe that works every time:
- 1/3 cup soy sauce
- 1/4 cup olive oil
- 2 tablespoons red wine vinegar
- 3 cloves garlic, minced
- 1 tablespoon brown sugar
- 1 teaspoon black pepper
- 1 teaspoon dried rosemary
Whisk everything together in a bowl. Taste it and adjust the salt if needed. The soy sauce already provides plenty of salt, so be careful not to overdo it.
Step 2: Marinate The Meat
Place the London broil in a large resealable bag or a shallow dish. Pour the marinade over it, making sure all surfaces are coated. Squeeze out excess air from the bag and seal it.
Refrigerate for at least 4 hours. Overnight is even better. The longer it sits, the more tender it becomes. Do not exceed 24 hours, or the texture can become mushy.
Turn the bag occasionally to distribute the marinade evenly. If you use a dish, cover it with plastic wrap and flip the meat halfway through.
Step 3: Bring To Room Temperature
About 30 minutes before cooking, take the meat out of the fridge. Remove it from the marinade and pat it dry with paper towels. Let it sit on a plate at room temperature.
This step is important. Cold meat cooks unevenly. The center will still be raw while the outside burns. Room temperature meat cooks more consistently.
Discard the used marinade. Do not reuse it for basting or sauce unless you boil it first to kill bacteria.
Step 4: Preheat Your Cooking Surface
You have two main options: broiling in the oven or grilling outdoors. Both work well, but they require slightly different approaches.
For broiling: Set your oven rack about 4 inches from the heating element. Preheat the broiler on high for at least 10 minutes. Place a broiler pan or a wire rack inside a baking sheet in the oven to heat up as well.
For grilling: Preheat your grill to high heat, around 450°F to 500°F. Clean the grates and oil them lightly to prevent sticking.
Step 5: Cook The London Broil
Season the meat with a little salt and pepper right before cooking. The marinade already added flavor, but a pinch of salt on the surface enhances the crust.
For broiling: Place the steak on the hot pan. Broil for 5 to 6 minutes per side for medium-rare. Use tongs to flip it carefully. Do not pierce the meat with a fork, as that releases juices.
For grilling: Place the steak on the hot grates. Grill for 4 to 5 minutes per side, depending on thickness. Close the lid between flips to maintain heat.
The exact time depends on thickness and your desired doneness. Use an instant-read thermometer for accuracy. Insert it into the thickest part of the steak.
- Rare: 120°F to 125°F
- Medium-rare: 130°F to 135°F
- Medium: 140°F to 145°F
Do not cook London broil beyond medium. It becomes tough and dry very quickly. Medium-rare is the sweet spot for tenderness and flavor.
Step 6: Rest The Meat
This step is non-negotiable. Transfer the cooked steak to a cutting board. Tent it loosely with aluminum foil. Let it rest for 10 minutes.
Resting allows the juices to redistribute throughout the meat. If you cut into it too soon, the juices run out onto the board and leave you with dry beef. Patience pays off here.
While it rests, you can prepare a quick pan sauce if you like. Deglaze the broiler pan or grill drippings with a splash of beef broth or red wine. Simmer for a minute and season to taste.
Step 7: Slice Against The Grain
This is the most important step for tenderness. Look at the meat and find the direction of the muscle fibers. They run in long lines across the steak. You need to cut perpendicular to those lines.
Use a sharp knife and slice the meat as thinly as possible, about 1/4 inch thick. Cutting against the grain shortens the muscle fibers, making each bite easier to chew.
If you slice with the grain, the meat will be stringy and tough, no matter how well you cooked it. Take your time and angle the knife correctly.
Common Mistakes To Avoid
Even experienced cooks make errors with London broil. Here are the most frequent problems and how to avoid them.
Overcooking The Meat
This is the number one mistake. London broil has very little fat, so it dries out fast. Cook it to no more than medium-rare. Use a thermometer to be sure.
If you prefer medium, reduce the cooking time slightly and rely on carryover cooking. The internal temperature rises about 5°F during resting.
Skipping The Resting Period
Cutting into hot meat releases all the juices. You end up with a dry, disappointing meal. Always rest for at least 10 minutes. Cover it loosely to keep warm.
Cutting With The Grain
This makes even the most tender cut seem tough. Identify the grain direction before you start slicing. Cut perpendicular to it for the best texture.
Using Too Much Acid In The Marinade
Too much vinegar or citrus can “cook” the outer layer of the meat, making it mushy. Stick to the ratios in the recipe above. Balance acid with oil and seasonings.
Alternative Cooking Methods
Broiling and grilling are the most common methods, but you have other options. Each has its own advantages.
Pan-Searing And Oven Finishing
This method gives you a great crust and even cooking. Heat a cast-iron skillet over high heat with a little oil. Sear the steak for 2 minutes per side until browned.
Transfer the skillet to a preheated 400°F oven. Roast for 5 to 8 minutes, depending on thickness. Check the internal temperature and remove at 130°F for medium-rare.
Sous Vide London Broil
Sous vide ensures perfect doneness every time. Season the meat and seal it in a vacuum bag. Cook in a water bath at 130°F for 4 to 6 hours.
After the bath, pat the steak dry and sear it in a hot skillet for 1 minute per side. This gives you a tender, evenly cooked result with a nice crust.
Slow Cooker London Broil
This is not traditional, but it works for a shredded version. Brown the meat in a skillet first, then place it in a slow cooker with beef broth, onions, and garlic. Cook on low for 6 to 8 hours.
The meat becomes very tender and can be shredded. It is great for sandwiches or tacos. Slice it against the grain after cooking for the best texture.
Serving Suggestions
London broil pairs well with simple sides that do not overpower the beef. Here are some ideas.
- Roasted potatoes or mashed potatoes
- Steamed green beans or asparagus
- A crisp green salad with vinaigrette
- Sauteed mushrooms and onions
Leftovers are excellent cold in sandwiches. Slice the remaining meat thinly and pile it on crusty bread with horseradish sauce or mustard. You can also reheat it gently in a skillet with a little broth to prevent drying out.
Frequently Asked Questions
Can I Freeze London Broil Before Cooking?
Yes, you can freeze it raw for up to 3 months. Thaw it in the refrigerator overnight before marinating. Do not freeze it after cooking, as the texture suffers.
What If I Don’t Have A Meat Thermometer?
You can use the finger test. Press the center of the steak with your index finger. If it feels like the flesh at the base of your thumb when your hand is relaxed, it is medium-rare. This takes practice, so a thermometer is more reliable.
Can I Use A Different Marinade?
Absolutely. Try a mixture of balsamic vinegar, olive oil, garlic, and herbs. Or use a teriyaki-style marinade with ginger and sesame oil. Just keep the acid-to-oil ratio balanced.
How Do I Store Leftovers?
Wrap sliced leftovers tightly in plastic wrap or store in an airtight container. Refrigerate for up to 4 days. Reheat gently in a skillet or microwave with a splash of broth.
Is London Broil The Same As Flank Steak?
Not exactly. London broil is a cooking method, but stores often sell top round labeled as London broil. Flank steak is a different cut that can also be cooked using this method. Both benefit from marinating and slicing against the grain.
Final Tips For Success
Mastering how to cook london broil takes a little practice, but the results are worth it. Focus on three things: marinate long enough, cook to medium-rare, and slice thinly against the grain.
Do not be afraid to experiment with flavors. Try different herbs, spices, and acids in your marinade. Each combination gives the meat a unique personality.
Remember that the meat will continue cooking after you remove it from the heat. Pull it off the grill or out of the oven when it is about 5°F below your target temperature. The carryover heat will finish the job.
With these techniques, you can turn a budget-friendly cut into a resturant-quality meal. Serve it with confidence and enjoy every bite.