How Long to Cook London Broil in the Oven?
London broil needs to be cooked in the oven long enough to reach your desired internal temperature, which generally translates to about 20-25 minutes at 400°F for medium-rare, extending the time for greater levels of doneness. Use a meat thermometer to ensure accuracy and prevent overcooking.
Understanding London Broil
London broil, despite its name, isn’t a specific cut of beef. It’s a cooking method applied to a relatively lean and tough cut, typically top round or flank steak. The key to a tender and delicious London broil is proper cooking and, equally importantly, proper slicing against the grain. Baking in the oven offers a convenient and consistent way to achieve a beautifully cooked London broil.
Benefits of Oven-Cooking London Broil
Oven-cooking London broil provides several advantages over other methods like grilling or pan-searing:
- Even Cooking: The oven’s consistent temperature promotes even cooking throughout the steak, minimizing hot spots and ensuring a uniform level of doneness.
- Hands-Off Approach: Once placed in the oven, the London broil requires minimal intervention, freeing you up to prepare side dishes.
- Easier Temperature Control: Maintaining a precise oven temperature makes it easier to achieve your desired level of doneness, especially when combined with a meat thermometer.
- Less Smoke: Compared to grilling, oven-cooking produces significantly less smoke, making it a more comfortable option for indoor cooking.
Preparing Your London Broil for the Oven
Proper preparation is critical for a successful London broil:
- Choose Your Cut: Opt for top round or flank steak. Flank steak tends to be wider and thinner.
- Marinate (Highly Recommended): Marinating tenderizes the meat and infuses it with flavor. A minimum of 30 minutes, but ideally several hours (or overnight) is suggested. Common marinade ingredients include:
- Soy sauce
- Worcestershire sauce
- Olive oil
- Vinegar (balsamic, red wine)
- Garlic
- Herbs (rosemary, thyme)
- Spices (pepper, paprika)
- Bring to Room Temperature: Allowing the London broil to sit at room temperature for 30 minutes before cooking helps it cook more evenly.
- Pat Dry: Pat the steak dry with paper towels to promote a good sear.
- Season (Optional): Even with a marinade, a light seasoning of salt and pepper just before cooking can enhance the flavor.
Step-by-Step Oven-Cooking Process
Follow these steps for a perfectly cooked London broil:
- Preheat Oven: Preheat your oven to 400°F (200°C).
- Sear (Optional but Recommended): While not strictly necessary for oven-cooking, searing the London broil on the stovetop before transferring it to the oven adds a beautiful crust and enhances the flavor. Sear for 2-3 minutes per side in a hot skillet with oil.
- Bake: Place the London broil on a baking sheet or in an oven-safe skillet. Bake according to the guidelines in the table below.
- Check Temperature: Use a meat thermometer to check the internal temperature. Insert the thermometer into the thickest part of the steak.
- Rest: Remove the London broil from the oven and let it rest for 10-15 minutes before slicing. This allows the juices to redistribute, resulting in a more tender and flavorful steak.
Cooking Time Guide
This table provides a general guideline for cooking times at 400°F (200°C). Always use a meat thermometer for accurate results.
| Doneness | Internal Temperature (°F) | Internal Temperature (°C) | Approximate Cooking Time (minutes) |
|---|---|---|---|
| Rare | 125 | 52 | 15-20 |
| Medium-Rare | 130-135 | 54-57 | 20-25 |
| Medium | 140-145 | 60-63 | 25-30 |
| Medium-Well | 150-155 | 66-68 | 30-35 |
| Well-Done | 160+ | 71+ | 35+ |
- Note: Cooking times can vary depending on the thickness of the steak and your oven.
Common Mistakes to Avoid
- Overcooking: This is the most common mistake. London broil is best served medium-rare to medium. Overcooking will result in a tough and dry steak.
- Skipping the Marinade: The marinade is crucial for tenderizing the meat.
- Not Slicing Against the Grain: This is essential for tenderness. Look for the muscle fibers and slice perpendicular to them.
- Not Resting the Meat: Resting allows the juices to redistribute, preventing them from running out when you slice the steak.
- Using an Inaccurate Thermometer: Investing in a reliable meat thermometer is essential for precise cooking.
Slicing and Serving
- Identify the Grain: Examine the steak to determine the direction of the muscle fibers (the “grain”).
- Slice Against the Grain: Use a sharp knife to slice the steak thinly against the grain. This shortens the muscle fibers, making the steak easier to chew.
- Serve Immediately: Serve the sliced London broil immediately with your favorite side dishes. Great options include roasted vegetables, mashed potatoes, or a simple salad.
Frequently Asked Questions (FAQs)
What is the ideal internal temperature for London Broil?
The ideal internal temperature depends on your preferred level of doneness. Medium-rare (130-135°F) is widely considered the best for tenderness and flavor.
Can I cook London Broil from frozen?
While not recommended, it is possible to cook London Broil from frozen. However, it will significantly increase the cooking time, and the results may not be as tender. It’s always best to thaw the steak completely before cooking.
How do I know when my London Broil is done without a thermometer?
Using a thermometer is the most reliable method, but you can also use the touch test. Press the center of the steak with your finger. If it feels soft and yielding, it’s likely rare; if it has some give but is firmer, it’s medium-rare; and if it feels firm, it’s likely well-done. However, this method requires experience.
What is the best marinade for London Broil?
There’s no single “best” marinade, but a good marinade should contain an acid (vinegar, lemon juice), oil, and seasonings. A classic marinade often includes soy sauce, Worcestershire sauce, olive oil, garlic, and herbs.
Can I use a different oven temperature?
Yes, you can adjust the oven temperature, but you’ll need to adjust the cooking time accordingly. Lower temperatures will require longer cooking times, while higher temperatures will require shorter times. Monitor the internal temperature carefully.
Why is my London Broil tough?
Toughness is usually caused by overcooking or improper slicing. Ensure you’re not cooking the steak beyond medium, and always slice against the grain. Marinating also helps tenderize the meat.
How long should I marinate London Broil?
Ideally, marinate London Broil for at least 30 minutes, but longer marinating times (several hours or overnight) will result in a more flavorful and tender steak.
What are some good side dishes to serve with London Broil?
Roasted vegetables (asparagus, Brussels sprouts, carrots), mashed potatoes, baked potatoes, salads, and grilled corn are all excellent choices. Choose side dishes that complement the rich flavor of the beef.
Can I grill London Broil instead of baking it?
Yes, grilling is a popular method. The cooking time will be similar, but you’ll need to watch the steak closely to prevent burning. Use a medium-high heat and grill for 4-5 minutes per side for medium-rare.
How do I store leftover London Broil?
Store leftover London Broil in an airtight container in the refrigerator for up to 3-4 days. Reheat gently to avoid overcooking.
How can I reheat London Broil without drying it out?
Reheat London Broil slowly in a low oven (250°F) or in a skillet with a little broth or water. Avoid microwaving, as it can make the steak tough and dry.
Is London Broil a healthy choice?
London Broil is a relatively lean cut of beef, making it a healthier option than some other steaks. It’s a good source of protein and iron. However, moderation is key, and it’s important to trim any excess fat before cooking.