Introduction
London broil is a lean, quick-cooking beef cut that becomes tender and flavorful when prepared with enough heat. The cut may be sold thick and unbutterflied or thin with two lobes joined together, so thickness and package labels can vary. Learning How to Bake London Broil in Oven? is useful because a hot conventional oven can create a browned exterior and juicy center without the constant supervision required by a broiler.
A high-oven method is simpler than cooking directly under the broiler and gives you more room to judge temperature and doneness. The most important factors are preheating the oven, drying the steak, using a light-colored pan, and checking the internal temperature with an instant-read thermometer. This guide explains the process from preparation through serving, along with cooking times, doneness guidance, and solutions for common problems.
Table of Contents
- Introduction
- What Is London Broil?
- London Broil vs. Other Steak Cuts
- Ingredients and Equipment
- How to Prepare London Broil
- How to Bake London Broil in Oven?
- Cooking Times and Safe Doneness
- Tips and Best Practices
- Common Mistakes and Quick Fixes
- Serving Ideas
- Storage and Reheating
- Frequently Asked Questions
- Conclusion
What Is London Broil?
London broil is a broad name for a boneless beef cut that is usually thin, moderately lean, and suitable for fast cooking. Depending on the butcher or retailer, it may come from the sirloin, flank, or another beef section. Some pieces are naturally wide and flat, while others are butterflied and opened like a book. The package should say “London broil,” but the best way to understand the piece is to inspect its thickness.
Unlike a filet mignon, London broil has more muscle and a stronger beef flavor. Unlike a rib steak, it usually has less fat and no large bone. Its quick-cooking nature makes oven baking an efficient option for weeknight meals, but a lean cut can become dry if cooked too long. That is why the recommended thickness is usually between three-fourths of an inch and 1¼ inches.
Some cooks marinate London broil to make it more tender. Others simply salt, pepper, and bake it at high heat. Both methods can work, but the marinade should complement the beef rather than cover its flavor. Oil, garlic, black pepper, rosemary, and mild acidity are particularly suitable. A marinade with a high sugar content can burn before the steak is fully cooked.
London Broil vs. Other Steak Cuts
Beef labels can vary by region, so London broil is not always identical to a cut sold under the same name elsewhere. In general, however, it is flatter and faster-cooking than a thick top sirloin, while it may be more substantial and tender than a very lean flank steak.
| Steak | Typical Characteristics | Best Baking Approach | Main Watch-Out |
|---|---|---|---|
| London broil | Often flat or butterflied; moderately lean; usually three-fourths to 1¼ inches thick | Bake uncovered at 425°F for direct browning and even cooking | Thicker pieces may need pounding or slicing to create an even thickness |
| Flank steak | Long, thin, and lean, with a pronounced grain direction | Cook quickly at high heat and slice against the grain | It becomes chewy quickly if it reaches well-done temperatures |
| Top sirloin steak | Thicker and often more marbled, commonly 1 to 2 inches thick | Use a moderate oven temperature or sear first, then finish in the oven | Its greater thickness calls for a different cooking-time estimate |
| Skirt steak | Thin, flavorful, and often slightly irregular in shape | Place on a preheated pan and cook briefly at high heat | Its natural fat can cause flare-ups, so avoid an overcrowded pan |
Ingredients and Equipment
A simple seasoning blend highlights the beef without interfering with the high-heat cooking method. The following quantities are enough for approximately four servings, depending on the size of the steak.
- London broil steak: 1½ to 2 pounds, preferably an even three-fourths to 1¼ inches thick
- Kosher salt: 1 to 1½ teaspoons, adjusted for steak weight and any salty marinade
- Freshly ground black pepper: 1 teaspoon or more to taste
- Garlic powder: 1 teaspoon
- Smoked paprika: ½ teaspoon, optional
- High-heat cooking oil: 1 tablespoon for the pan and steak
- Fresh lemon: half or one whole lemon, optional for serving
- Unsalted butter: 1 to 2 tablespoons, optional for finishing after cooking
You will also need a rimmed baking sheet, cast-iron skillet, or broiler pan. A heavy sheet with low sides is ideal because it heats quickly and allows the steak’s surface to brown. An instant-read thermometer is strongly recommended, along with paper towels for drying the meat and a sharp knife for slicing it against the grain.
How to Prepare London Broil
Begin by checking the steak before seasoning. If it consists of two thin connected lobes, unfold it and place the flatter side on your cutting board. If one area is more than 1½ inches thick, slice the thicker portion from the underside and spread it out beside the thinner portion. Do not hammer a thin cut unnecessarily; excessive pounding can dry the outer edges before the center is cooked.
For a very thick London broil, place plastic wrap over the steak and pound only the thick sections to bring them closer to the thickness of the thin sections. Aim for an even three-fourths to 1-inch steak when possible. This makes heat penetration faster and reduces the likelihood of a burned outside with a cold center.
Pat the steak thoroughly dry with paper towels. Moisture left on the surface turns into steam and interferes with browning. Mix the salt, pepper, garlic powder, and optional paprika, then season both sides and the edges. Season at least 15 minutes before cooking so the salt can penetrate the surface. A 30- to 45-minute rest also works, but a steak left for many hours can lose its desirable seared surface.
If using a marinade, choose a low-sugar blend and marinate the steak in the refrigerator for 30 minutes to 4 hours. Acid can make this naturally lean beef more tender, while oil carries flavor. Do not combine a salty marinade with a full salt seasoning, and avoid thick, sugary coatings that are likely to blacken under high heat.
How to Bake London Broil in Oven?
The method below produces a browned exterior and controlled center without requiring a pre-sear. Pre-searing is optional but helpful if you want a deeper crust.
- Preheat the oven and prepare the pan. Set a conventional oven to 425°F. For convection cooking, use 400°F. Position the rack in the center of the oven and heat the oven fully. Rub a rimmed baking sheet or cast-iron skillet with 1 tablespoon of high-heat oil. Place the pan in the oven while it preheats if you want extra browning from the hot metal.
- Prepare and dry the steak. Remove the London broil from its packaging and place it on a clean board. Slice or gently pound any unusually thick section until the steak has a mostly even thickness. Pat both sides and the edges with paper towels. If the surface is dry and lightly seasoned, it will brown much better in the hot oven.
- Add the seasoning. Combine 1 to 1½ teaspoons of kosher salt, 1 teaspoon of black pepper, 1 teaspoon of garlic powder, and ½ teaspoon of smoked paprika, if using. Season all sides, including the folded seam of a butterflied cut. Let the steak stand for 15 to 30 minutes. If you prefer garlic and rosemary flavor without powder, mince one or two garlic cloves and combine them with the dry seasoning.
- Optionally sear for a deeper crust. For a quick hard sear, heat 1 tablespoon of oil in a cast-iron skillet over high heat. Place the steak in the hot pan and cook for 1½ to 2 minutes per side. The surface should look deeply browned, but it does not need to be fully cooked. Transfer the steak and, if possible, the hot skillet to the oven. This step is optional; the oven can brown the steak by itself.
- Place the steak on the hot pan. Use oven mitts to place the prepared baking sheet in the center of the oven. Set the steak flat and leave space around it. If the cut remains joined at one edge, put the heavier seam toward the center of the pan. Do not cover the steak with foil because an uncovered surface browns more effectively.
- Bake until the desired doneness is reached. A steak about 1 inch thick will usually need 7 to 12 minutes at 425°F, but its exact thickness, starting temperature, and oven strength matter more than the clock. Begin checking early with an instant-read thermometer. Insert it horizontally into the thickest part without touching the pan or bone. If the steak browns much faster than it cooks, loosely tent it with foil and reduce the oven temperature to 400°F.
- Pull the steak and allow carryover cooking to finish it. For a moist center, pull the steak when the thermometer is approximately 3 to 5°F below your target. Residual heat will raise the temperature while the steak rests. A thin London broil can gain heat quickly, so inspect the first side before assuming it needs the full estimated time.
- Rest and slice correctly. Transfer the steak to a clean cutting board and let it rest for 5 minutes. A thicker piece benefits from an 8-minute rest. Add butter, lemon juice, or a finishing sauce now rather than during baking, where butter may burn. Slice against the grain into thin strips or thick slices and serve immediately.
Cooking Times and Safe Doneness
Cooking time is only an estimate. A thermometer is the best tool because the two lobes of a butterflied London broil may not have identical thickness. Use the chart below as a starting point for a steak approximately 1 inch thick cooked in a 425°F conventional oven.
| Preferred Doneness | Approximate Final Temperature | Estimated Time | Result |
|---|---|---|---|
| Rare | 125 to 129°F | 5 to 7 minutes | Very juicy center with a cool or slightly warm appearance |
| Medium-rare | 130 to 134°F | 7 to 9 minutes | Pink center with a browned outer surface |
| Medium | 135 to 144°F | 9 to 12 minutes | Firm pink or light center; commonly preferred for this lean cut |
| USDA-recommended doneness | At least 145°F, followed by a 3-minute rest | 12 to 15 minutes | Completely cooked through while retaining some juiciness |
USDA food-safety guidance for intact beef steaks is an internal temperature of at least 145°F followed by a three-minute rest. People at higher risk of foodborne illness should not eat steak that is rare or undercooked. If cooking to that recommendation, verify that the center reaches 145°F before serving.
For a steak under three-fourths of an inch thick, begin checking several minutes earlier. For a cut closer to 1½ inches, add roughly 3 to 5 minutes, while continuing to rely on temperature rather than time. A steak taken directly from the refrigerator may also need a few extra minutes. If using convection, the lower starting temperature and faster heat should shorten the estimate.
Tips and Best Practices
- Choose an even piece when possible. A steak with a consistent thickness cooks more predictably than one that changes abruptly from thin to thick.
- Dry the surface thoroughly. Patting away moisture promotes browning and prevents steam from softening the seasoning.
- Give the oven enough time to preheat. Place the steak in a fully heated oven rather than beginning immediately in a still-cool oven.
- Do not crowd the pan. Multiple steaks can lower the pan temperature and trap moisture. Cook in batches if necessary.
- Season before the oven, not after. Raw seasoning applied at the table rarely develops the same roasted flavor as seasoning that cooks on the surface.
- Keep sugary sauces for the end. Barbecue sauce, sweet marinades, and glazes contain sugar and should be added only during the final few minutes or after cooking.
- Turn or rotate only when necessary. An even steak can often cook on one side in the oven. If one edge darkens excessively, rotate the pan or cut the browned portion first.
- Protect the steak from burning, not from cooking. A loose foil tent is helpful if the top browns rapidly, but wrapping the entire steak traps steam and prevents browning.
- Rest before slicing. Resting keeps more juice in the meat and makes the grain easier to identify when cutting across it.
- Add moisture after cooking. London broil is lean, so melted butter, a pan sauce, lemon, or a dressing can improve the final texture and flavor.
Common Mistakes and Quick Fixes
- Using a sugary marinade at full heat. Sugar burns before the beef is tender. Use a low-sugar marinade, wipe off excess liquid, and season mainly with salt, pepper, garlic, and herbs.
- Leaving the steak wet. Surface moisture interferes with searing and browning. Pat the steak dry immediately before applying oil, seasoning, or placing it on the hot pan.
- Crowding the baking sheet. Several steaks touching one another create steam and increase the cooking time. Leave at least an inch of space around each piece when possible.
- Cooking only by the stated time. London broil pieces vary significantly in thickness. Begin checking earlier than the recipe’s maximum time and use an instant-read thermometer to determine doneness.
- Overcooking the cut. Well-done London broil is often dry and chewy because it is lean. Many cooks prefer medium to medium-rare, while diners needing the USDA-recommended temperature should still avoid overcooking it beyond 145°F.
- Leaving the steak on the oven shelf after baking. Carryover cooking continues after removal. Resting the steak also allows its temperature to become more even. A five-minute rest is usually enough for a thin cut.
- Cutting parallel to the grain. Slicing along the muscle fibers makes even a tender steak seem tough. Identify the direction of the grain and rotate the knife 90 degrees before slicing.
- Using an uneven cooking area. A baking sheet placed too close to the oven’s top element may scorch while the bottom remains cool. Use the center rack and allow the steak to cook on both sides.
- Adding butter too early. The milk solids in butter can burn in a 425°F oven. Add butter after the steak has finished cooking, or make a sauce in a lower-temperature pan.
Serving Ideas
A classic London broil needs only a few finishing ingredients. Slice it across the grain and place it on a warm plate. Add a spoonful of garlic herb butter, flaky salt, cracked black pepper, and a squeeze of lemon. Crusty bread and roasted potatoes make simple, satisfying accompaniments because they soak up the steak’s juices.
For a Mediterranean-style meal, serve the sliced beef with chopped tomatoes, cucumber, red onion, feta, oregano, olive oil, and lemon. The fresh, acidic side balances the richness of butter or a pan sauce. Greek-style roasted potatoes and broccolini or asparagus also work well.
For a sandwich, pile the slices onto toasted bread with sautéed onions, mushrooms, or roasted peppers. A mayonnaise-based steak sauce is especially convenient because a small amount of fat and acidity keeps the lean meat from tasting dry. Serve the sandwich with a crisp salad, sweet potato fries, or a bowl of soup.
Because London broil is lean and strongly flavored, it pairs especially well with starchy and acidic sides. Good options include mashed potatoes, rice, roasted root vegetables, grilled asparagus, green beans, tomato salad, coleslaw, or a sharp vinaigrette. Avoid serving a large steak with only bland rice and no sauce, because the lack of fat can make the entire meal feel dry.
Storage and Reheating
Let leftover steak cool slightly before storing it. Slice or keep it whole, place it in an airtight container, and refrigerate within two hours. Cooked beef generally keeps well in the refrigerator for three to four days. Press out excess air or use a sealed container to reduce drying and odor transfer.
For the best texture, reheat a thick piece in a 325°F oven. Place it on a lightly oiled baking sheet or in a small covered oven-safe dish and warm it for approximately 10 to 20 minutes. For thin strips, heat 1 to 2 teaspoons of oil in a skillet over medium heat and warm the beef for 2 to 3 minutes per side.
A microwave can reheat leftover slices quickly, but it often makes the edges tough. Microwave the steak in short intervals, then transfer it to a warm skillet for one minute to restore some texture. If preparing a cold leftover for food-safety purposes, heat it to 165°F. Freshly sliced beef is usually more flavorful and tender than a steak that was cooked, cooled, and reheated.
Frequently Asked Questions
How long should London broil bake at 425°F?
The straightforward answer to How to Bake London Broil in Oven? is to use 425°F and check the steak frequently. A one-inch piece generally needs about 7 to 12 minutes, depending on its starting temperature and desired doneness. A thin cut may finish in 5 to 8 minutes, while a thick cut may need 12 to 15. Start checking early because carryover heat will continue raising the internal temperature after the steak is removed.
Can I bake London broil instead of using the broiler?
Yes. Baking at 425°F gives London broil enough heat for a browned exterior and cooked center without the intense, close-up heat of a broiler. It is also less likely to burn because the steak is not positioned directly below a heating element. For broiler-style results, you can briefly sear the steak in a hot cast-iron skillet before transferring it to the oven.
What internal temperature should London broil reach?
The right temperature depends on your preferred doneness and food-safety needs. Rare is approximately 125 to 129°F, medium-rare is 130 to 134°F, and medium is 135 to 144°F. USDA guidance for intact beef steaks recommends at least 145°F followed by a three-minute rest. Because London broil is lean, pulling it a few degrees below the target and letting carryover heat finish the cooking can help preserve its juices.
Should I tenderize London broil before baking?
Thin London broil usually does not require mechanical tenderizing. Check the cut first, and flatten only the unusually thick areas. If the steak is on the lean or chewy side, a short marinade containing oil, lemon, vinegar, or Worcestershire sauce may help. Keep the soaking time between 30 minutes and 4 hours; long or repeated marinating can make the surface mushy.
Can I bake London broil from frozen?
You can bake it from frozen, but thawing in the refrigerator is more reliable and produces more even cooking. If cooking from frozen, remove all outer packaging, place the steak on a preheated baking sheet, and begin checking 10 to 15 minutes earlier than the usual time. The outside may brown before the center thaws, so tenting it loosely with foil can help. Never marinate or season a frozen steak that is still icy.
Why is my baked London broil tough?
Toughness usually results from excessive cooking, an unevenly thick cut, slicing along the grain, or a naturally lean piece that needs a brief marinade. Check the temperature frequently, remove the steak before it exceeds your target, and let it rest. Then rotate the cutting board before slicing so the knife cuts across the visible muscle fibers. A small amount of sauce, butter, or acidic dressing also helps make the finished steak taste more tender.
Conclusion
The answer to How to Bake London Broil in Oven? is a hot preheated oven, an evenly sized steak, a lightly oiled pan, and careful temperature control. Cook an approximately one-inch piece at 425°F for roughly 7 to 12 minutes, adjusting for thickness, convection, starting temperature, and desired doneness. The thermometer matters more than the clock.
Dry the surface well, avoid a sugary marinade, give the steak enough space, and protect it with foil only if it browns too quickly. Pull it slightly below the target temperature, rest it for several minutes, and slice across the grain. These simple steps produce a browned, flavorful London broil while keeping this quick-cooking cut from becoming unnecessarily tough or dry.