How Long to Cook London Broil in the Oven?
Generally, to achieve a perfect medium-rare London broil in the oven, plan for approximately 20-25 minutes at 400°F (200°C) per inch of thickness, depending on your desired level of doneness. Remember to use a meat thermometer for accurate internal temperature.
Understanding London Broil: A Lean Cut with Potential
London broil, despite its name, isn’t actually a specific cut of beef. It’s a method of preparing a tougher, leaner cut, often top round or flank steak, through marinating and broiling (or in this case, baking). Done right, it transforms into a flavorful and relatively tender meal. Understanding this allows you to better control the cooking process and achieve consistently delicious results.
Benefits of Oven-Cooking London Broil
Baking London broil in the oven offers several advantages over other cooking methods:
- Even Cooking: The consistent heat of the oven promotes more uniform doneness throughout the steak.
- Control: Oven temperature is easily regulated, allowing for precise control over the cooking process.
- Convenience: Baking is relatively hands-off, freeing you up to prepare side dishes.
- Less Mess: Compared to searing on the stovetop, oven baking minimizes splatter.
The Essential Steps to Perfectly Cooked London Broil
Achieving the ideal oven-baked London broil involves several key steps:
- Marinating: This is crucial for tenderizing the meat. Marinate for at least 2 hours, but ideally overnight. A good marinade typically includes an acid (like vinegar or citrus juice), oil, and seasonings.
- Preheating: Preheat your oven to 400°F (200°C).
- Searing (Optional but Recommended): For enhanced flavor and a beautiful crust, sear the London broil in a hot skillet with oil for 2-3 minutes per side before transferring it to the oven.
- Baking: Place the London broil on a baking sheet or in an oven-safe skillet.
- Temperature Monitoring: Use a meat thermometer to monitor the internal temperature.
- Resting: Absolutely essential! Let the London broil rest for at least 10 minutes before slicing. This allows the juices to redistribute, resulting in a more tender and flavorful final product.
Recommended Internal Temperatures
| Doneness | Internal Temperature (°F) | Internal Temperature (°C) |
|---|---|---|
| Rare | 125-130 | 52-54 |
| Medium-Rare | 130-135 | 54-57 |
| Medium | 135-145 | 57-63 |
| Medium-Well | 145-155 | 63-68 |
| Well-Done | 155+ | 68+ |
Common Mistakes to Avoid
Several common pitfalls can lead to a disappointing London broil. Avoid these mistakes:
- Skipping the Marinade: Never skip the marinade! It’s the key to tenderness.
- Overcooking: Overcooking London broil results in a tough, dry steak. Use a meat thermometer and err on the side of undercooking. Remember that the temperature will continue to rise slightly as it rests.
- Not Resting: Resting allows the juices to redistribute, resulting in a more tender steak. Cutting into it immediately will cause all the juices to run out.
- Slicing Incorrectly: Always slice against the grain. This shortens the muscle fibers, making the steak easier to chew. Look closely at the London broil to identify the direction of the grain before slicing.
- Uneven Thickness: If your London broil has significant variations in thickness, consider pounding it to a more uniform thickness before marinating. This will ensure even cooking.
How Long to Cook London Broil in the Oven? The Time Table
The best answer to “How Long to Cook London Broil in the Oven?” depends on thickness and desired doneness. Here’s a general guideline for a 400°F (200°C) oven:
- 1-inch thick, Medium-Rare: 20-25 minutes
- 1.5-inch thick, Medium-Rare: 30-35 minutes
- 1-inch thick, Medium: 25-30 minutes
- 1.5-inch thick, Medium: 35-40 minutes
Remember to always use a meat thermometer for accurate results.
Slicing and Serving
Once rested, slice the London broil thinly against the grain at a slight angle. This maximizes tenderness. Serve immediately. Great accompaniments include roasted vegetables, mashed potatoes, or a fresh salad.
Alternative Cooking Temperatures
While 400°F (200°C) is a good starting point, some recipes suggest other temperatures. Cooking at a lower temperature (e.g., 350°F/175°C) will take longer but can result in a slightly more tender steak, especially if you are aiming for medium or medium-well. Adjust the cooking time accordingly, always using a meat thermometer. Conversely, a higher temperature (e.g., 425°F/220°C) will cook the steak faster and may result in a more pronounced sear, but requires careful monitoring to prevent overcooking. Mastering how long to cook London broil in the oven at various temperatures requires experimentation and precise temperature monitoring.
Frequently Asked Questions
What is the best marinade for London broil?
The best marinade contains a balance of acid, oil, and seasonings. A common and effective recipe includes olive oil, balsamic vinegar, Worcestershire sauce, garlic, Dijon mustard, salt, and pepper. Experiment with different herbs and spices to find your favorite flavor profile. Soy sauce and brown sugar can also add depth and complexity.
Can I cook London broil from frozen in the oven?
While it’s not recommended to cook London broil directly from frozen, you can do it in a pinch. However, it will significantly affect the texture and cooking time. It’s always best to thaw the steak completely in the refrigerator before cooking. If cooking from frozen, you will need to significantly increase the cooking time and use a lower oven temperature (e.g., 325°F/160°C) to ensure even cooking.
What if my London broil is very thick?
For a very thick London broil (over 1.5 inches), consider searing it on the stovetop before baking to develop a good crust. You may also need to lower the oven temperature slightly to ensure even cooking throughout. Use a meat thermometer to ensure the internal temperature reaches your desired doneness.
How do I know when my London broil is done?
The most reliable way to determine doneness is to use a meat thermometer. Insert the thermometer into the thickest part of the steak, avoiding bone. Refer to the internal temperature chart above for your desired level of doneness.
Can I use a convection oven to cook London broil?
Yes, you can use a convection oven. Convection ovens circulate hot air, which can result in faster and more even cooking. However, you may need to reduce the cooking time slightly. Start checking the internal temperature a few minutes earlier than you would in a conventional oven.
What sides go well with London broil?
London broil pairs well with a variety of side dishes. Roasted vegetables (such as asparagus, Brussels sprouts, or potatoes), mashed potatoes, a fresh salad, or grilled corn on the cob are all excellent choices.
How long should I let London broil rest after cooking?
Resting is crucial for a tender and juicy London broil. Allow the steak to rest for at least 10 minutes, but ideally 15-20 minutes, before slicing. Cover it loosely with foil to keep it warm.
Can I reheat London broil without drying it out?
Reheating London broil can be tricky. To prevent it from drying out, reheat it slowly in a low oven (around 250°F/120°C) or in a skillet with a small amount of broth or sauce. Avoid microwaving it, as this can make it tough and rubbery.
How should I store leftover London broil?
Store leftover London broil in an airtight container in the refrigerator for up to 3-4 days.
Is London broil healthy?
London broil is a relatively lean cut of beef, making it a healthier option than some other cuts. It’s a good source of protein, iron, and zinc. However, it’s important to choose lean cuts and trim any excess fat.
Can I grill London broil instead of baking it?
Yes, grilling is a popular method for cooking London broil. Follow the same marinating and resting guidelines as you would for baking. Grill over medium-high heat for about 5-7 minutes per side for medium-rare.
What is the difference between London broil and flank steak?
While London broil is often made from flank steak or top round, it’s more of a preparation method than a specific cut. Flank steak is a specific cut from the abdominal muscles of the cow, while top round comes from the upper part of the rear leg. Both cuts benefit from marinating and slicing against the grain.