Perfect Oven Baked London Broil

Unlock the secrets to preparing a truly exceptional **London Broil in the oven at 350°F**. This comprehensive guide will show you how to transform an economical cut of beef into a perfectly tender, juicy, and flavorful steak with a beautiful medium-rare interior. Ideal for weeknight dinners or special occasions, our method focuses on proper marination, precise cooking times, and a crucial resting period to deliver succulent results in less than 30 minutes of active cooking. If you’ve enjoyed our methods for other roasts, prepare to add this simple yet impressive **oven-baked London Broil** to your culinary repertoire.

How Long to Cook London Broil in the Oven? Achieving Perfection

One of the most appealing aspects of preparing London Broil in the oven is its relatively short cooking time, especially when aiming for a delicious medium-rare finish. Generally, you can expect your London Broil to be ready in about 10-15 minutes of oven time at 350°F, after an initial sear. This makes it an incredibly convenient option for a quick, protein-packed dinner. Despite often being an economical cut of beef, when prepared correctly—with the right marinade and precise cooking—London Broil transforms into a tender and incredibly flavorful meal.

However, several factors can influence the exact cooking duration required to reach your desired doneness. These include the precise thickness of your beef, the initial temperature of the meat, the accuracy of your oven, and whether you choose to sear it before baking. Understanding these variables is crucial for achieving a **perfectly cooked London Broil** every time. Our aim is a luscious medium-rare, characterized by a pink center and maximum juiciness, but we’ll provide guidelines for various doneness levels.

To begin, selecting the right piece of beef is paramount. For London Broil, we typically recommend a cut of top round or flank steak, ideally about 1 to 1.5 inches thick. This thickness allows for even cooking and a beautiful crust without drying out the interior. The true secret weapon for London Broil, however, is the marinade. Unlike more naturally tender cuts, these leaner steaks greatly benefit from an acidic marinade that tenderizes the muscle fibers while infusing deep flavor. While every chef might have a slightly different preferred blend, a common and effective base includes olive oil, balsamic vinegar, and garlic. From there, you can customize with herbs and spices to match your taste. We often use a similar marinade base for various preparations, including slow cooker methods, highlighting its versatility.

The cooking time for your London Broil will depend significantly on the chosen cooking method and, most importantly, the thickness of your beef. For the most tender and flavorful results, we advocate a high-heat approach for a limited duration. The goal is to achieve an internal temperature that aligns with your preferred doneness, followed by a critical resting period. For a superb medium-rare, the ideal final internal temperature after resting should be around **135°F (57°C)**. It’s important to remember that the meat will continue to cook slightly after being removed from the oven, a phenomenon known as carry-over cooking. Below is a general guide to help you estimate cooking times and target temperatures:

How Long to Cook London Broil in Oven at 350°F

These times are estimates for a 1.5-inch thick London Broil, assuming an initial sear. Always use a meat thermometer for accuracy.

• Rare: 6-8 minutes per side (sear) then 8-10 minutes in oven. Internal temperature: 125°F (52°C) when removed from oven, rising to 130°F (54°C) after resting.
• Medium-Rare: 8-10 minutes per side (sear) then 10-12 minutes in oven. Internal temperature: 130°F (54°C) when removed from oven, rising to 135-140°F (57-60°C) after resting.
• Medium: 10-12 minutes per side (sear) then 12-14 minutes in oven. Internal temperature: 140°F (60°C) when removed from oven, rising to 145-150°F (63-66°C) after resting.
• Medium-Well: 12-14 minutes per side (sear) then 14-16 minutes in oven. Internal temperature: 150°F (66°C) when removed from oven, rising to 155-160°F (68-71°C) after resting.
• Well Done: 14-16 minutes per side (sear) then 16-18 minutes in oven. Internal temperature: 160°F (71°C) when removed from oven, rising to 165°F+ (74°C+) after resting.

To consistently achieve your desired doneness, a reliable digital meat thermometer is your most valuable tool. Remember that every oven can vary slightly in temperature, and factors like rack height, the specific type of pan, and even the fat content of your beef can influence cooking times. Always start checking for doneness at the minimum suggested time, as it’s easier to continue cooking a steak than to salvage an overcooked one. By monitoring the internal temperature, you remove the guesswork and guarantee a perfectly cooked London Broil tailored to your preferences.

Essential Ingredients for Your London Broil

A simple yet potent marinade is the cornerstone of a tender and flavorful London Broil. Here’s what you’ll need for our recommended marinade and cooking process:

• 1-1.5 lbs topside **beef** (top round or flank steak), about 1.5 inches thick
• 3 tbsp **olive oil** (2 tbsp for marinade, 1 tbsp for frying/searing)
• 2 tbsp **soy sauce** (adds umami and helps tenderize, or use half soy sauce and half Worcestershire for an extra kick)
• 1 tbsp **balsamic vinegar** (the acidic component that tenderizes and adds depth of flavor)
• 1/2 tsp **granulated garlic**
• 1/2 tsp **granulated ginger**
• 1/2 tsp **cumin**
• 1/2 tsp **sea salt** (added after searing to control browning and prevent drying)
• 1/2 tsp **black pepper**

Beyond the ingredients, you’ll want to have a few key kitchen tools on hand: a sturdy freezer bag for marinating, a baking sheet, a reliable cutting board, and a very sharp knife for slicing against the grain. While the baking time itself is short, the preparation—especially the marinating—is where most of your time will be spent, so plan accordingly to allow the flavors to fully develop.

Preparing a 2-Pound London Broil Roast in the Oven

While the weight of your chosen cut can vary, a London Broil typically ranges from 1.5 to 2 pounds, which is often ideal for feeding a family of four to five with a complementary side dish. As mentioned, the preferred cuts for this preparation are usually top round or flank steak. The critical factor for success is maintaining a consistent thickness, ideally between 1.5 and 2 inches. Thinner cuts risk drying out, while thicker cuts may require a longer cooking time or a different approach to ensure even doneness. These cuts are known for being tough due to their abundant connective tissue. However, the magic happens during marination. The acidic components in the marinade work to break down these tough fibers, tenderizing the meat and preparing it for a beautiful, tender slice once cooked. Without proper marination, these cuts would be challenging to enjoy.

Step-by-Step Directions for Perfect London Broil

Follow these steps carefully to achieve a wonderfully tender and flavorful London Broil:

• Prepare the Beef: Begin by rinsing your topside beef (London Broil) under cold water. Pat it thoroughly dry on all sides using paper towels. This step is crucial for allowing the marinade to penetrate effectively and for achieving a good sear later.
• Mix the Marinade: In a medium bowl, combine 2 tablespoons of olive oil (reserving 1 tablespoon for searing), balsamic vinegar, soy sauce, granulated garlic, granulated ginger, cumin, and black pepper. Whisk these ingredients together until well combined, creating a homogeneous marinade. Avoid adding salt at this stage, as it can draw moisture out of the meat prematurely.
• Marinate the Beef: Place the dried beef into a large, sturdy freezer bag. Pour the prepared marinade over the beef, ensuring it is fully coated. Seal the bag, pressing out as much air as possible, then gently massage the bag to distribute the marinade evenly. Refrigerate for at least 2 hours, or ideally overnight (up to 24 hours) for maximum tenderness and flavor infusion.
• Preheat and Prepare: Once marinated, remove the beef from the refrigerator and let it sit at room temperature for about 30 minutes. This helps ensure more even cooking. Carefully remove the beef from the marinade, discarding any excess. Pat the beef dry with fresh paper towels to remove any residual marinade, which will help achieve a better sear. Preheat your oven to 350°F (175°C).
• Sear for Flavor: Heat the remaining 1 tablespoon of olive oil in a large oven-safe skillet (cast iron works wonderfully) over medium-high heat on the stovetop until shimmering. Once hot, carefully place the London Broil into the skillet. Sear the beef for 4 minutes on each side until a deep brown crust forms. This searing step creates the rich, complex flavors of the Maillard reaction and helps develop a desirable texture.
• Oven Baking: After searing, transfer the skillet (if oven-safe) or the beef to an oiled baking dish. Season the seared beef generously with sea salt and fresh black pepper. Cover the baking dish tightly with aluminum foil to trap moisture.
• Bake to Doneness: Place the covered dish in the preheated oven and bake for approximately 12-15 minutes. The exact time will depend on the thickness of your beef and your desired level of doneness.
• Rest and Slice: For a perfect medium-rare, remove the beef from the oven when its internal temperature reaches about 130°F (54°C) with your digital meat thermometer. This is crucial. Immediately wrap the beef tightly in foil and let it rest on a cutting board for at least 10 minutes. During this resting period, carry-over cooking will cause the internal temperature to rise further, typically to 135-140°F (57-60°C) for a beautiful medium-rare, and allows the juices to redistribute throughout the meat, ensuring maximum tenderness and juiciness.
• Serve: After resting, unwrap the London Broil and slice it thinly against the grain. Slicing against the grain is vital for tender results, as it shortens the muscle fibers, making each bite easier to chew. Serve immediately with your favorite side dishes.

Cooking London Broil in the Oven Without Searing

While searing your London Broil before baking is highly recommended for an optimal culinary experience, it is possible to cook it entirely in the oven without this initial step. Searing creates a delicious caramelized crust through the Maillard reaction, which contributes significantly to both the flavor and texture of the final dish. It doesn’t “lock in juices” as commonly believed, but it does develop hundreds of new flavor compounds. If you choose to skip the searing step, your London Broil might lack some of the deep, rich flavor and appealing browned exterior. To compensate for the omitted searing, you will need to add an additional 6-8 minutes to the total oven cooking time to ensure the meat reaches your desired internal temperature.

A great London Broil truly shines with the right marinade. The purpose of a marinade for this cut of meat is twofold: to tenderize the tougher muscle fibers and to infuse the beef with layers of delicious flavor. The acidic components (like vinegar or citrus juice) in a marinade work to break down proteins, making the meat more tender, while oils and seasonings add moisture and taste. The beauty of marinades is their versatility; you can customize them to your liking. Some marinades emphasize a bolder balsamic profile, while others might lean towards brighter, more acidic notes from ingredients like lemon or lime juice. The basic process remains the same: whisk your chosen marinade ingredients together, place your top round steak, flank steak, or other suitable cut into a gallon-sized freezer bag, pour in the marinade, seal, and refrigerate for at least 2 hours or up to overnight for the best results.

Classic London Broil Marinade

This timeless marinade provides a perfect balance of acidity, savory notes, and aromatic herbs, ideal for tenderizing and flavoring London Broil.

• 1/4 cup balsamic vinegar
• 2 tablespoons olive oil
• 2 cloves garlic, minced
• 1 tablespoon Dijon mustard
• 1 teaspoon dried rosemary
• 1 teaspoon dried thyme
• Salt and pepper to taste (add to meat after marinating, before searing)

Bright Citrus Herb Marinade

For a lighter, more vibrant flavor profile, this marinade incorporates the zest and juice of citrus fruits along with fresh herbs, offering a refreshing twist.

• Juice and zest of 1 orange
• Juice and zest of 1 lemon
• 1/4 cup olive oil
• 2 cloves garlic, minced
• 1 tablespoon fresh chopped parsley
• 1 tablespoon fresh chopped thyme
• Salt and pepper to taste (add to meat after marinating, before searing)

Should you pierce London Broil before marinating?

Yes, gently piercing the London Broil with a fork before marinating can be beneficial. It creates small channels that allow the marinade to penetrate deeper into the meat’s fibers, enhancing both flavor and tenderization. While not strictly necessary, as the acidic marinade will still work its magic on the surface, a quick round of poking all over the steak before placing it in the marinade can yield even better results. This is especially true for thicker cuts.

Can you over-marinate London Broil?

While marination is crucial, there is indeed a point of diminishing returns, and even a risk of over-marinating, especially with acidic marinades. Generally, you shouldn’t marinate London Broil for longer than 24 hours. Prolonged exposure to acidic ingredients can begin to break down the meat’s proteins too much, leading to a mushy or mealy texture rather than a tender one. Always keep the meat refrigerated during the entire marinating process to prevent bacterial growth. The minimum recommended marinating time is 1 hour, but 2-4 hours is often ideal to allow the flavors to soak in sufficiently and the acids to effectively tenderize the connective tissues, resulting in a wonderfully fork-tender steak.

How to Reheat Leftover London Broil

Reheating cooked beef, particularly a lean cut like London Broil, can be challenging. The goal is to warm it through without drying it out or making it tough, which can easily happen with overcooking. Fortunately, with the right techniques, you can successfully revive your leftovers, preserving their delicious flavor and tender texture. Here are a few reliable methods to consider for your leftover London Broil:

Reheating London Broil in the Oven

This method is excellent for larger pieces of leftover London Broil, allowing for gentle, even heating.

• Preheat your oven to a low temperature, around 275°F (135°C). This low heat helps to warm the meat gradually without cooking it further.
• Place the leftover London Broil on a baking sheet. Add a tablespoon or two of beef broth, water, or leftover marinade to the bottom of the pan to create some steam and prevent drying.
• Cover the baking sheet tightly with aluminum foil to trap moisture and ensure even heating.
• Heat the meat in the oven for about 15-20 minutes, or until it reaches the desired internal temperature (around 130-140°F for medium-rare to medium). Use a meat thermometer to monitor the temperature for accuracy.

Reheating London Broil on the Stove

This method is quicker and works particularly well for thinner slices of leftover London Broil.

• Heat a skillet (preferably cast iron) over medium heat. Add a small amount of oil, butter, or beef broth to the pan.
• Once the skillet is hot, add the leftover slices of London Broil.
• Heat the slices for just 1-2 minutes per side, turning frequently, until they are warmed through. Be very careful not to overcook, as high heat can quickly make the meat tough and dry.

Reheating London Broil in the Microwave

The microwave offers the quickest reheating option, but it requires careful attention to avoid uneven heating and drying out the meat.

• Place the leftover London Broil on a microwave-safe plate. If reheating multiple slices, arrange them in a single layer.
• Cover the meat with a damp paper towel. This helps create steam, retaining moisture and preventing the meat from drying out.
• Microwave the meat on medium power for 30-second intervals. After each interval, check the temperature and flip the meat. Continue until it’s heated to your liking. Avoid overheating, which is the primary cause of dry, tough microwaved meat.

Essential Reheating Tips for Success

• Rest the Meat: Regardless of the reheating method, allow the warmed meat to rest for a few minutes before slicing or serving. This brief rest helps the juices redistribute, resulting in a more tender and flavorful outcome.
• Add Moisture: To combat dryness, always consider adding a little moisture during reheating. This can be beef broth, water, or even a dab of butter, especially when using the oven or stovetop. Covering with foil or a damp paper towel is also effective.
• Slice Thinly: If you have larger leftover pieces, consider slicing them into thinner pieces before reheating. Thinner slices will heat more evenly and quickly, reducing the risk of overcooking the exterior while the interior warms up.
• Monitor Temperature: When reheating, aim for an internal temperature of about 130°F (54°C) for medium-rare or 140°F (60°C) for medium. Using a meat thermometer is the best way to ensure it’s warmed through without being overcooked.
• Re-Marinate (Optional): If you saved some of the original marinade or a similar sauce, drizzling a small amount over the meat before reheating can add back flavor and moisture, making it taste freshly cooked.

By implementing these thoughtful methods and practical tips, you can confidently **reheat your London Broil leftovers without sacrificing its flavor or tenderness**. The key is vigilance and gentle heating. With a little care, your second meal will be just as delicious as the first.