How Long to Cook London Broil on Grill in 7 Simple Steps
Choose a well-marbled London Broil, about 1 to 1.5 inches thick, and marinate it for 4 to 12 hours to boost flavor and tenderness. Preheat your grill to high heat (450-500°F) for 10-15 minutes. Grill the steak about 4-6 minutes per side, aiming for medium-rare to medium doneness. Use a meat thermometer to check, then let it rest 5-10 minutes before slicing against the grain. Keep following these steps to master every detail.
Choose the Best London Broil Cut and Ideal Thickness
When selecting your London Broil, opt for a cut that’s well-marbled and about 1 to 1.5 inches thick to ensure even cooking and maximum flavor.
Look for cuts from the top round or flank steak, as these provide the best balance of tenderness and taste. Avoid pieces that are too thin or uneven, since they can cook too fast or unevenly on the grill.
You want a thick enough steak to sear well on the outside while staying juicy inside.
Also, check for a bright red color and firm texture, which indicate freshness.
How to Marinate London Broil for Maximum Flavor
To get the best flavor from your London Broil, you need to choose the right marinade that balances acidity and seasoning.
You’ll want to marinate it long enough—usually between 4 to 12 hours—to tenderize the meat without overpowering it.
Try adding techniques like scoring the meat or using a resealable bag to ensure the marinade penetrates evenly.
Choosing The Right Marinade
Because London Broil is a lean cut, you’ll want a marinade that both tenderizes and enhances its natural flavor. Look for acidic ingredients like vinegar, lemon juice, or wine to break down tough muscle fibers. Adding oil helps distribute flavors and keeps the meat moist. Herbs and spices bring depth without overpowering the beef’s taste. Here’s a simple guide to choosing your marinade components:
| Ingredient Type | Examples |
|---|---|
| Acid | Balsamic vinegar, lemon juice |
| Oil | Olive oil, avocado oil |
| Sweetener | Brown sugar, honey |
| Herbs & Spices | Garlic, rosemary, black pepper |
Mix these thoughtfully, and your London Broil will be flavorful and tender, ready for the grill.
Marinating Time Guidelines
Marinating London Broil for the right amount of time unlocks its full flavor potential while tenderizing the meat. You’ll want to marinate it for at least 4 hours to let the flavors penetrate deeply.
For best results, aim for 6 to 8 hours, which balances flavor infusion without compromising texture. Avoid marinating longer than 24 hours, as the acids can break down the meat too much, making it mushy.
Always marinate in the refrigerator to keep the meat safe and fresh. Use a non-reactive container or a resealable plastic bag to ensure even coating.
When ready, remove the meat from the marinade, pat it dry, and get it on the grill for a perfectly flavored and tender London Broil every time.
Enhancing Flavor Techniques
When you want to unlock the fullest flavor in your London Broil, choosing the right marinade ingredients is key. Combine acidic components like vinegar, lemon juice, or wine with oil to tenderize and keep the meat juicy.
Add garlic, soy sauce, Worcestershire sauce, or herbs such as rosemary and thyme for depth. Don’t forget a touch of sweetness from honey or brown sugar to balance the acidity.
Marinate your meat in a resealable bag or shallow dish, making sure every inch is coated. Refrigerate it for at least 4 hours or overnight for maximum infusion.
Before grilling, pat the meat dry to ensure a great sear. This technique enhances flavor and texture, turning your London Broil into a delicious, mouthwatering meal.
Preheat Your Grill for London Broil
Before you start cooking, make sure to preheat your grill to a high temperature, around 450-500°F.
This helps sear the meat and lock in the juices. Aim to heat your grill for at least 10-15 minutes to reach the ideal temperature.
Ideal Grill Temperature
Although London Broil is a tough cut, achieving a perfect sear depends on your grill reaching the ideal temperature. Aim for a high heat, around 450°F to 500°F, to lock in juices quickly and create that signature crust.
If the grill is too cool, your steak will cook unevenly and become dry. On the other hand, too much heat can char the outside before the inside cooks properly.
Use a grill thermometer to monitor the temperature accurately, adjusting the vents or burners as needed to maintain steady heat.
Preheating Duration Tips
Maintaining the right grill temperature starts with giving your grill enough time to heat up properly. Preheat your grill for at least 10 to 15 minutes before placing the London broil on it. This ensures the grates reach the ideal temperature for a good sear, locking in juices and flavor.
If you use a gas grill, turn all burners to high and close the lid during preheating. For charcoal grills, wait until the coals are covered with white ash, signaling they’re hot enough.
Avoid rushing this step, as placing the meat on a cold grill can lead to uneven cooking. Taking the time to preheat properly sets the foundation for a perfectly grilled London broil every time.
Grill London Broil to Desired Doneness
When you grill London Broil, paying attention to the internal temperature ensures you achieve the perfect doneness. Aim for medium-rare if you want a juicy and tender steak, which means cooking it to about 130-135°F.
For medium, target 140-145°F, offering a slightly firmer texture without drying out the meat. If you prefer medium-well, cook it to 150-155°F, though be cautious to avoid overcooking.
Remember to flip the steak halfway through grilling for even cooking. Let the meat rest for 5-10 minutes after grilling; this allows the juices to redistribute, enhancing flavor and tenderness.
Adjust your grilling time based on steak thickness and heat intensity to hit your desired doneness every time.
Use a Meat Thermometer to Check London Broil Doneness
Since guessing doneness can lead to overcooked or undercooked meat, you should use a meat thermometer to check your London Broil’s internal temperature accurately.
Insert the thermometer into the thickest part of the meat, avoiding bone or fat for a precise reading. For medium-rare, aim for 130–135°F; medium is around 140–145°F, and well-done reaches 160°F or higher.
Check the temperature a few minutes before the estimated cooking time ends to prevent overcooking. Using a reliable digital thermometer will give you quick, clear results.
This simple step ensures your London Broil is cooked just right, juicy, and tender every time. Don’t rely on touch or guesswork—let the thermometer guide your grilling for perfect results.
Let London Broil Rest Before Slicing
Although it’s tempting to slice into your London Broil right off the grill, you should let it rest for at least 5 to 10 minutes. Resting allows the juices to redistribute throughout the meat, making each bite juicy and flavorful instead of dry.
If you cut into it immediately, those flavorful juices will spill out onto the cutting board. To rest your London Broil, loosely cover it with foil to keep it warm without trapping steam, which could make the crust soggy.
This brief wait also helps the meat finish cooking evenly as the residual heat continues to work. So, resist the urge to dive in right away—this simple step will significantly improve your final result.
Slice London Broil Against the Grain for Tenderness
Two simple words can make a big difference in how tender your London Broil turns out: slice against the grain. The grain refers to the direction of the muscle fibers in the meat. Cutting across these fibers shortens them, making each bite easier to chew. If you slice with the grain, the meat stays tough and chewy.
After letting your London Broil rest, look carefully for the lines running through the steak. Position your knife perpendicular to those lines and cut thin slices. This technique breaks up the muscle fibers and enhances tenderness.
Taking this extra step guarantees a more enjoyable eating experience, turning a naturally lean cut into a juicy, tender treat every time. Don’t overlook this simple but crucial tip.
Frequently Asked Questions
Can I Cook London Broil Indoors Instead of on a Grill?
Yes, you can cook London broil indoors using a broiler or stovetop grill pan. Just make sure to preheat, cook evenly, and rest the meat for juicy, flavorful results without needing an outdoor grill.
What Side Dishes Pair Best With Grilled London Broil?
You’ll love pairing grilled London broil with roasted vegetables, garlic mashed potatoes, or a fresh garden salad. Grilled asparagus or corn on the cob also complement the rich, smoky flavors perfectly. Don’t forget a tangy chimichurri!
How Do I Store Leftover Grilled London Broil Properly?
Don’t worry about toughness—the key is to store leftover London broil in an airtight container. Wrap it tightly, refrigerate within two hours, and enjoy tender, flavorful slices later. You’ll love how fresh it stays!
Is London Broil Suitable for Slow Cooking or Braising?
Yes, you can slow cook or braise London broil. It’s a tougher cut that benefits from low, slow cooking to become tender and flavorful. Just make sure to cook it long enough for the best results.
Can I Freeze Marinated London Broil Before Grilling?
Yes, you can freeze marinated London broil before grilling. Just make sure to seal it tightly in an airtight container or freezer bag. Thaw it in the fridge overnight before cooking for best flavor and texture.
Conclusion
Now that you know how to grill the perfect London Broil, remember: good things come to those who wait. Marinate it well, preheat your grill, and cook to your preferred doneness using a meat thermometer. Let it rest before slicing against the grain for maximum tenderness. With these simple steps, you’ll enjoy a flavorful, juicy meal every time. So fire up the grill and savor the delicious results—you’ve earned it!