London broil is a delicious, budget-friendly cut of beef known for its robust flavor and satisfying texture. Though the name can be a bit misleading, it usually refers to flank steak or top round—both lean cuts that benefit greatly from proper marinating and grilling. When cooked right on a gas grill, a London broil can be tender, juicy, and full of smoky goodness that’s perfect for any backyard gathering.
Grilling a London broil on a gas grill gives you excellent temperature control and consistent heat distribution, which are key for achieving the perfect sear without drying out the meat. It is essential to prepare the steak correctly and understand the grilling times to get the best results. This guide will walk you through everything from marinating to resting, ensuring your London broil turns out restaurant-quality every time.
By following these simple steps, you can master the art of cooking a London broil on your gas grill. Whether you’re a beginner or looking to refine your grilling skills, the tips below will boost your confidence and make your next barbecue a hit with family and friends.
Choosing and Preparing Your London Broil
Selecting the Right Cut
London broil typically consists of flank steak or top round, which are both affordable and flavorful options. Flank steak is narrower and has more visible grain, while top round is slightly thicker with a finer texture. Choose a cut that weighs about 1.5 to 2 pounds to ensure even cooking.
Preparing Your Steak
Before grilling, trim off any excess fat or silver skin to avoid chewiness. This step will help enhance the steak’s texture and improve marinade absorption. Pat the steak dry with paper towels to remove surface moisture, which promotes better browning on the grill.
Marinating for Maximum Flavor and Tenderness
Since London broil comes from lean muscle, marinating is essential for breaking down tough fibers and infusing flavor. A good marinade usually includes an acidic ingredient like vinegar or citrus juice, oil, herbs, and spices. Common choices include soy sauce, Worcestershire sauce, garlic, and black pepper.
Marinade Idea:
- ½ cup soy sauce
- ¼ cup olive oil
- 2 tablespoons lemon juice
- 2 cloves garlic, minced
- 1 teaspoon black pepper
Marinate the steak for at least 4 hours or overnight in the refrigerator to allow the flavors to penetrate deeply.
Setting Up Your Gas Grill for London Broil
Preheat and Clean the Grill
A clean grill prevents sticking and promotes even cooking. Start by brushing off any residue from previous use. Preheat your gas grill to medium-high heat, around 400–450°F, to get a strong sear on the steak’s surface.
Understanding Heat Zones
Create two heat zones on your gas grill: one side with direct high heat and the other with indirect medium heat. This setup lets you sear the steak initially and then move it to a cooler zone to finish cooking without burning.
Grilling Your London Broil
Searing the Steak
Place the marinated steak directly over the high heat side of the grill. Cook each side for about 4–5 minutes to get a nice, caramelized crust. Avoid moving the steak around too much; this lets the grill marks form and seals in juices.
Finishing with Indirect Heat
Once both sides are seared, transfer the steak to the indirect heat zone. Close the lid and cook for another 6–10 minutes, depending on thickness and desired doneness. Use a meat thermometer to check internal temperature:
| Doneness | Internal Temperature (°F) | Description |
|---|---|---|
| Rare | 120–125 | Cool red center |
| Medium Rare | 130–135 | Warm red center |
| Medium | 140–145 | Pink center |
| Medium Well | 150–155 | Slightly pink center |
| Well Done | 160+ | No pink, fully cooked |
Resting Your Steak
Once the steak reaches your preferred temperature, remove it from the grill and tent it loosely with foil. Rest it for at least 10 minutes to allow the juices to redistribute. Resting is key to keeping the meat juicy and tender.
Slicing and Serving London Broil
Proper Slicing Technique
London broil benefits from slicing against the grain to shorten the muscle fibers and make it easier to chew. Look for the lines running through the meat and cut perpendicular to them in thin, even slices.
Serving Suggestions
Serve your London broil with classic sides such as grilled vegetables, mashed potatoes, or fresh salad. You can also top it with a flavorful sauce like chimichurri or a balsamic glaze for an extra boost of taste.
Tips for the Best London Broil on a Gas Grill
- Use a marinade with acid and oil: This tenderizes and keeps the meat moist.
- Don’t skip resting: It improves flavor and juiciness significantly.
- Avoid overcooking: Lean cuts can become tough if cooked past medium.
- Invest in a good meat thermometer: Accurate temps ensure perfect doneness every time.
- Let the steak reach room temperature: Before grilling, remove it from the fridge 30 minutes ahead for even cooking.
- Keep the grill lid closed: This traps heat and smoke, cooking the steak more evenly.
Conclusion
Grilling a perfect London broil on a gas grill is easier than you might think when you follow the right steps. From marinating to managing grill heat, each stage contributes to a juicy, tender steak with rich flavor. The key is patience—allow the marinade to work, manage your grill zones carefully, and resist the urge to slice immediately.
Remember to slice against the grain and rest your steak well, to truly bring out the best texture and taste. London broil is an excellent choice for a flavorful yet affordable meal that can impress family and guests alike. With these techniques, your next gas grill session will deliver a steak dinner worthy of any celebration.
FAQ
What is the best marinade for London broil?
A marinade with an acidic base like vinegar or lemon juice combined with oil, garlic, and soy sauce works best. It tenderizes the meat and enhances flavor without overpowering the beef’s natural taste.
How long should I marinate London broil?
For optimal flavor and tenderness, marinate the steak for at least 4 hours, although overnight is ideal. Avoid marinating longer than 24 hours as the texture might become mushy.
Can I cook London broil without a marinade?
While it’s possible, marinating is highly recommended. The marinade breaks down the muscle fibers and prevents the lean cut from becoming tough during grilling.
What internal temperature should I cook London broil to?
For the best tenderness, cook London broil to medium rare or medium (130–145°F). Cooking beyond medium can result in a drier, chewier steak.
How do I know when my London broil is done on the gas grill?
Use a reliable meat thermometer inserted into the thickest part of the steak. Check against doneness temperature charts and remove the steak from the grill a few degrees before your target as it will continue to cook while resting.