How Long Cook London Broil in Oven? Easy Step-by-Step Cooking Guide

Introduction

If you are searching for how long to cook London broil in the oven, the answer depends on the thickness of the cut, how well you preheat the broiler, and whether you want a deeply browned exterior or a gentler finish. London broil is a thick, meaty steak made from the beef loin. Because it is usually larger than a standard steak, it needs a longer broiling time than a sirloin, flank steak, or thin cutlet.

This guide explains how long cook London broil in oven, provides useful timing for different thicknesses, and gives you a step-by-step method for achieving a browned crust and an evenly cooked center. You will also find guidance on oven temperature, preheating, marinating, checking doneness, resting, and avoiding common mistakes.

The most reliable approach is to use the oven broiler as a quick finishing method rather than relying only on a set number of minutes. Start checking the beef early because broilers vary in intensity, and use an instant-read thermometer to confirm the internal temperature. A little variation in broiling time is normal, but a consistent method produces the best results.

Table of Contents

• Introduction
• What Is London Broil?
• How Long to Cook London Broil
• Factors That Affect Cooking Time
• Step-by-Step Cooking Guide
• Timing Guide by Thickness
• How to Check Doneness
• Temperature and Cooking Method Comparison
• Marinating London Broil
• Best Practices for a Perfect Broil
• Common Mistakes and How to Avoid Them
• Serving London Broil
• Frequently Asked Questions
• Conclusion

What Is London Broil?

London broil is a beef cut from the top portion of the loin. It is often described as a combination of New York strip and rib steak because it has a substantial thickness, a rich beef flavor, and enough marbling to remain juicy during cooking. Unlike a thin steak, it is usually cooked whole or in very thick slices.

The cut is frequently sold as a boneless or bone-in roast, and its thickness can vary considerably. A piece that is about 1 inch thick may finish much faster than a 2-inch roast. The shape also matters. A compact, round piece cooks more evenly than a long cut with tapered edges.

When broiling, the outside of the London broil becomes browned through intense direct heat. Because the beef is thick, the surface can look done before the center is hot. This is why the cooking time must be treated as an estimate and checked with a thermometer. A broiler is excellent for creating a savory crust, but it is not a substitute for monitoring the internal temperature.

Most home cooks broil London broil after seasoning or marinating it. The beef is then transferred to a preheated broiler pan, placed on an oven rack, and broiled until the top is browned. Some recipes begin with a lower-temperature oven cook and finish under the broiler, which is useful for very thick cuts and helps prevent the outside from burning before the center cooks through.

How Long to Cook London Broil

For a typical London broil that is 1.5 to 2 inches thick, broil for approximately 12 to 18 minutes on each side at a high broiler setting. A thinner piece may require only 8 to 12 minutes per side, while a thick roast may need 18 to 24 minutes per side or a combination of oven cooking and broiling.

These are estimates rather than strict rules. The word “broil” refers to the heating method, not a single universal temperature or cooking time. Some broilers use intense direct heat and cook quickly, while others are more moderate. The distance between the beef and the heating element can also change the result.

A general starting point is to preheat the broiler on high for five to ten minutes, place the London broil on the center rack, and broil one side until it is deeply browned but not charred. Turn the steak and repeat. Check the temperature after the first side and again after the second. If the top is browning too quickly, move the rack lower or reduce the broiler setting if your oven allows it.

For a medium-rare result, aim for an internal temperature of about 130 to 135 degrees Fahrenheit and let the beef rest before slicing. For medium, aim for roughly 135 to 145 degrees Fahrenheit. Many cooks choose medium, while some prefer a firmer result. Regardless of personal preference, the beef should reach at least 145 degrees Fahrenheit for a safe medium temperature according to common food-safety guidance, followed by a short rest.

If you are answering the question “how long cook London broil in oven?” by using a recipe that finishes the beef under the broiler, the total cooking time may be longer than the broiling time. For example, a very thick piece might cook for 20 to 30 minutes in a conventional oven and then broil for 4 to 8 minutes per side. This method provides more time for the center to cook without sacrificing the browned exterior.

Factors That Affect Cooking Time

Thickness is the most important factor. A London broil that is 1 inch thick will cook considerably faster than one that is 2 inches thick. As a general rule, each additional inch of thickness can require several more minutes, but the exact increase depends on the oven and the shape of the cut.

The starting temperature of the beef also matters. Meat brought directly from the refrigerator may take longer than meat that has rested at room temperature for 20 to 30 minutes. Letting the roast stand briefly before cooking does not guarantee perfectly even cooking, but it can help the interior cook more evenly.

The broiler setting matters as well. Most recipes call for a high setting, but if the beef is very close to the element, the top may brown before the center changes. Moving the rack farther away from the heat reduces the intensity. If the oven has a low or medium broil option, it can be useful for thicker cuts, although the exterior may take longer to brown.

Moisture on the surface can also affect timing. A very wet steak may spend extra time releasing water before it begins to brown. Patting the beef dry before seasoning helps the surface sear and brown more efficiently. Oil, Worcestershire sauce, and marinade also add moisture, so allowing the meat to sit briefly after coating it can improve browning.

Pan placement and thickness influence heat distribution. Place the London broil in the center of a preheated broiler pan so hot air can circulate around it. Use a rack or the bottom of the pan depending on your recipe. A sturdy pan is important because the beef may release juices, and the pan may be very hot when removed.

Finally, bone-in cuts require attention near the bone. The bone can insulate one area, making that section cook more slowly. A boneless roast is usually easier to cook evenly, but it may benefit from rotating the pan halfway through if the broiler has a hot spot.

Step-by-Step Cooking Guide

1. Trim the beef if needed. Excess surface fat can flare or char before the meat finishes cooking. Leave a thin layer of flavor, but remove any large, loose pieces. If the cut is very thick and uneven, ask your butcher to trim it or work with the more uniform portion.

2. Pat the London broil dry. Blot both sides with paper towels. A dry surface browns more quickly and is less likely to steam. If you plan to marinate it, do this step after marinating, because the marinade can add moisture.

3. Season evenly. Sprinkle kosher or sea salt and freshly ground black pepper on both sides. Garlic powder, onion powder, smoked paprika, or Italian seasoning can also be used, but keep the seasoning balanced so the beef flavor remains prominent.

4. Bring the meat to a moderate starting temperature. Take the beef out of the refrigerator about 20 to 30 minutes before cooking. This allows the surface and outer layers to lose some of their chill, helping the roast cook more evenly.

5. Preheat the broiler. Place the oven rack about 3 to 4 inches from the broiler element, or in the position recommended by the oven manufacturer. Set the broiler to high and let it heat for 5 to 10 minutes. Do not put the beef under a cold broiler.

6. Place the beef on a preheated broiler pan. Set the London broil on the center rack. If using a marinade, pour off excess liquid from the pan. Excess marinade can drip onto the heating element, create smoke, or cause the underside to burn. (See Also:Why Does Oven Door Lock)

7. Broil the first side. Close the oven door and cook without opening it for roughly 8 to 15 minutes, depending on thickness and broiler intensity. The top should become evenly browned, with no blackened areas. If it colors too quickly, lower the rack or move the oven to a lower broil setting.

8. Check the temperature early. After 7 to 10 minutes on the first side, insert an instant-read thermometer into the thickest part without touching the pan or bone. The reading is still an estimate, but it helps you determine whether to continue cooking.

9. Turn the London broil. Use long tongs or oven mitts to turn the beef carefully. Cook the second side until it is browned and the center reaches your desired temperature. Remember that the cooking time for the second side may differ from the first.

10. Remove it from the oven. Place the beef on a clean cutting board or serving platter. Do not cut it immediately. Let it rest for 5 to 10 minutes, depending on the thickness, so the juices can settle and the slices will remain moist.

11. Slice against the grain. Use a sharp knife to cut the London broil across the grain. Thin slices are more tender, while thicker slices provide a more substantial steak-like texture. Finish with butter, salt, herbs, or a pan sauce if desired.

Timing Guide by Thickness

The following estimates assume a preheated oven broiler set to high, a beef temperature of approximately room temperature, and a cut that is reasonably uniform. Check the beef frequently, especially during the final few minutes. A pan that is already sizzling can reduce cooking time, while a thicker or colder piece may need additional time.

If the roast is over 2 inches thick, consider cooking it in a 350 to 400 degree Fahrenheit oven until the center is close to your desired temperature, then placing it under the broiler for the final few minutes. This can reduce the risk of burning the crust while leaving the center undercooked.

These times are not a substitute for a thermometer. Broilers vary widely, and a one-minute difference can change the color of the beef. For consistent results, choose one side as the reference side and stop when the thermometer shows that the center has reached the temperature you want.

How to Check Doneness

An instant-read thermometer is the most accurate way to determine when London broil is done. Insert it into the thickest part of the roast, avoiding the bone, fat, and the edge of the pan. If the thermometer cannot reach the center because the piece is too thick, check from both the side and the top, then use the highest reliable reading as your guide.

For food safety, allow the beef to reach at least 145 degrees Fahrenheit and rest before serving. The carryover temperature can raise the reading by a few degrees during the resting period. If you pull the beef at 140 degrees Fahrenheit, account for the carryover heat if you want a final temperature near 145 degrees Fahrenheit.

You can also use visual clues, but they are less dependable than a thermometer. A deeply browned top does not necessarily mean the center is hot. Pressing the beef may give you a rough idea, but the texture changes as the roast cooks and are difficult to compare without experience.

Always use a clean thermometer, take the reading away from the bone, and avoid taking a measurement only from a thin edge. The center of a London broil may be uneven, so checking in two locations can give you a better overall estimate.

Temperature and Cooking Method Comparison

The oven temperature setting and finishing method can change the appearance, texture, and total cooking time. Broiling is fast and produces a strong crust, while conventional oven cooking provides more even heat with less risk of burning the exterior.

If your oven has a convection setting, you can use convection for the cooking phase, but the broiler may still function at high intensity. Follow the manufacturer’s guidance because some convection broilers run hotter or cycle differently from standard broilers.

When comparing methods, consider the rack position. The closer the London broil is to the heating element, the faster the outside will brown. A lower rack or more moderate broil setting may improve results if the top burns before the interior is ready.

Marinating London Broil

A short marinade can add moisture, seasoning, and a savory flavor before broiling. Because London broil is thick, a marinade does not need to cook the meat. It mainly seasons the surface and may contribute a mild acidic flavor to the exterior.

For a simple two-hour marinade, combine soy sauce, Worcestershire sauce, olive oil, garlic, and a small amount of honey or brown sugar. The sugar helps the surface brown, but it can burn quickly under a hot broiler. Use it sparingly.

Another effective option is an oil-and-herb marinade made with olive oil, garlic, thyme, rosemary, black pepper, and salt. Acidic marinades made with lemon juice or vinegar should be monitored because prolonged exposure can change the texture of the beef surface. A few hours is generally more suitable than leaving London broil marinated overnight.

Before broiling, take the beef out of the marinade and blot away excess liquid. Leave the surface lightly seasoned, but do not let marinade or marinade juices pool beneath the meat. Place the beef on a rack inside the broiler pan if you want the underside to cook rather than soak in liquid.

You can also skip the marinade and use a dry rub. A mixture of salt, black pepper, garlic powder, paprika, and onion powder provides a clean, savory crust. Apply it shortly before cooking so the seasoning remains active and the surface is not overly wet.

Best Practices for a Perfect Broil

• Use a heavy, preheated pan. A cast-iron or sturdy metal pan distributes heat well and tolerates intense broiler temperatures. Handle the hot handle with dry oven mitts.

• Preheat the rack before adding the beef. A hot pan and hot air begin cooking the surface immediately, reducing the time spent steaming.

• Season just before cooking. Salt and spices need moisture to adhere, but a very wet surface takes longer to brown. Lightly oil the beef if you want to improve browning. (See Also:How To Bake 20 Potatoes In Oven)

• Keep the center of the oven. Position the beef away from the side walls, where some broilers create hot spots. Rotate the pan halfway through if necessary.

• Watch the first two minutes. Broilers can go from deeply browned to burned quickly. If the smell becomes acrid or the fat begins to smoke heavily, lower the rack or move to a lower setting.

• Turn with long tongs. Avoid piercing the beef or using a short utensil that may be difficult to control near the hot heating element.

• Use moderate heat for thick cuts. If the beef is more than 2 inches thick, finish it under the broiler only after it has spent most of its cooking time in a conventional oven.

• Rest before slicing. Resting makes the beef easier to serve and helps retain its juices. Place it on a clean board and loosely tent it with foil if you need to keep the surface warm.

• Slice across the grain. This shortens the muscle fibers and makes a large London broil noticeably more tender.

Common Mistakes and How to Avoid Them

The most common mistake is relying entirely on the cooking time. Broiler intensity varies from oven to oven, and a timed recipe cannot account for the thickness of your particular piece. Begin checking the temperature before the stated time is finished.

Another mistake is placing the beef too close to the heating element. The top may become black while the center remains cool. Move the rack lower, use a moderate broil setting, or switch to a conventional oven finish for very thick beef.

Overcrowding the pan can prevent the hot air from circulating around the London broil. If you are cooking more than one piece, use a separate pan on another rack or cook in batches. A full pan may also drip heavily and produce smoke.

A wet surface is another common problem. Pat the beef dry, avoid pouring a large amount of liquid beneath it, and remove excess marinade. Moisture delays browning and can make the top look pale even when the heat is adequate.

Do not skip the rack position. If you move the oven rack for the broiling step, place it in the manufacturer’s recommended broiler position before preheating. A cold rack or pan can reduce browning and increase the total cooking time.

Forgetting to rest the beef is not dangerous, but it can make the meat seem less juicy. The cut may release liquid as you slice. A 5 to 10 minute rest gives the juices time to redistribute, which is especially helpful for a large London broil.

Finally, do not cut the beef with a dull knife. Thick slices compress and tear when the blade is not sharp. A sharp chef’s knife or carving knife also gives you cleaner, more attractive slices.

Serving London Broil

After resting, slice the London broil across the grain and serve it immediately. The beef can stand alone, but it pairs well with roasted potatoes, grilled vegetables, rice, a simple green salad, or a fresh crusty bread. Because the cut is rich and flavorful, light or acidic sides balance the meal well.

For a simple sauce, spoon pan juices over the sliced beef after they have been reduced slightly on the stove. Be careful when handling the broiler pan because juices may be extremely hot and the rendered fat can smoke. Remove excess grease before making a sauce, if desired.

A compound butter made from softened butter, minced garlic, parsley, thyme, and lemon zest is another easy option. Let the butter soften at room temperature while the beef cooks, then serve small pieces over the hot slices. Fresh parsley or chopped chives add freshness without changing the character of the beef. (See Also:Who Can Fix My Oven Near Me)

For a meal-prep version, allow the London broil to cool slightly, slice it, and store it with a small amount of sauce or broth. Reheat gently in a covered pan so the beef does not become dry. Avoid high-heat reheating, which can make the edges tough and cause the sauce to scorch.

Frequently Asked Questions

How long do I broil a 2-inch London broil?

A 2-inch London broil usually needs about 12 to 18 minutes per side under a high broiler, but the exact time depends on your oven and the starting temperature. Begin checking after 10 to 12 minutes, and use a thermometer rather than relying only on color. For more even cooking, you can cook it in a 350 to 400 degree Fahrenheit oven first, then broil each side for about 4 to 8 minutes.

Do I need to preheat the broiler?

Yes. Preheat the broiler for at least 5 to 10 minutes before putting the beef inside. A cold burner takes time to reach full intensity, which can delay browning and make cooking times inconsistent. Keep the oven door closed during broiling, but check the beef through the oven window whenever possible.

Should I turn London broil while broiling?

Yes, turn it once when the first side is browned. Use long tongs and oven mitts, and avoid piercing the meat. If the beef is close to burning, move the rack farther from the element before continuing. Some cooks use a combination method that involves oven cooking followed by a short broil, but the beef should still be browned on both sides if serving it as a steak-style roast.

What temperature is London broil done?

For medium, cook the London broil to about 135 to 145 degrees Fahrenheit. Medium-rare usually falls around 130 to 135 degrees Fahrenheit, while a well-done piece reaches approximately 160 degrees Fahrenheit or higher. Common food-safety guidance recommends at least 145 degrees Fahrenheit, followed by a rest.

Can I cook frozen London broil?

It is better to thaw it fully before broiling. A frozen or partly frozen surface can create uneven cooking, excess moisture, and a pale exterior while the center remains cold. For fastest thawing, place the sealed cut in cold water and change the water periodically, or allow it to thaw safely in the refrigerator according to package guidance.

Why is my London broil burning on the outside?

The broiler may be too intense, the beef may be too close to the heating element, or the cut may be too thick for direct broiling alone. Move the rack lower, reduce the broil setting, use a broiler pan with some liquid, or finish the beef in a conventional oven. Also avoid leaving the oven door open, because that can change heat distribution and airflow.

Can I use a cast-iron pan for London broil?

Yes, but make sure the pan is broiler-safe and has a rim that can contain dripping fat. A cast-iron pan heats quickly and gives excellent browning. It also becomes extremely hot, so use a dry oven mitt and keep the handle covered. Never place a pan with a plastic or wooden handle under the broiler unless the manufacturer specifically approves it.

How long should London broil rest?

A 1- to 2-inch thick cut benefits from a 5 to 10 minute rest. Allow slightly more time for a very thick or bone-in piece. Resting improves juiciness and makes slicing easier. Loosely cover the beef with foil if you want to hold it for several minutes, but avoid trapping so much steam that the crust becomes soft.

Conclusion

So, how long cook London broil in oven? Most London broil cuts that are 1.5 to 2 inches thick need approximately 12 to 18 minutes per side under a preheated high broiler. Thinner pieces may finish in 8 to 12 minutes per side, while thicker roasts may require a lower-temperature oven finish followed by a short broil.

The most important factors are the thickness of the beef, the broiler’s intensity, and the internal temperature. Pat the London broil dry, season it evenly, preheat the pan and broiler, and check the temperature before the recipe’s estimated time is over. Let the finished beef rest before slicing it across the grain.

With these steps, you can achieve the browned exterior and tender, evenly cooked interior that make London broil such a satisfying meal. Use the timing ranges as a starting point, then adjust based on your oven and your preferred doneness.