London broil is a popular cut of beef that is perfect for grilling, and with the right cooking time, it can be a tender and flavorful dish. However, the grilling time for London broil can be a bit tricky to get right, as it depends on the thickness of the meat and the desired level of doneness. In this article, we will provide a comprehensive guide on how to grill a London broil to perfection, including the optimal grilling time and temperature.
The Importance of Grilling Time for London Broil
The grilling time for London broil is critical, as it can make or break the dish. If you undercook the meat, it will be tough and raw, while overcooking it will make it dry and flavorless. The ideal grilling time for London broil is between 8-12 minutes per side, depending on the thickness of the meat and the heat level of your grill.
Factors Affecting Grilling Time for London Broil
There are several factors that can affect the grilling time for London broil, including:

- Thickness of the meat: Thicker cuts of meat will take longer to cook than thinner ones.
- Heat level of the grill: A higher heat level will cook the meat faster than a lower one.
- Desired level of doneness: If you prefer your meat cooked to a higher level of doneness, it will take longer to cook.
- Grill type: Gas, charcoal, or electric grills will have different cooking times.
Grilling Times for London Broil Based on Thickness
The grilling time for London broil can vary depending on the thickness of the meat. Here are some general guidelines for grilling times based on the thickness of the meat:
| Thickness of Meat | Grilling Time (per side) |
|---|---|
| 1-1.5 inches | 8-10 minutes |
| 1.5-2 inches | 10-12 minutes |
| 2-2.5 inches | 12-15 minutes |
Temperature Control for Grilling London Broil
Temperature control is crucial when grilling London broil. You want to make sure that the meat is cooked to a safe internal temperature of at least 145°F (63°C) for medium-rare, 160°F (71°C) for medium, and 170°F (77°C) for well-done.
How to Check for Doneness
There are several ways to check for doneness when grilling London broil, including:

- Using a meat thermometer: Insert the thermometer into the thickest part of the meat and check the internal temperature.
- Checking the color: Cooked meat will be pink in the center and brown on the outside.
- Using the finger test: Press the meat gently with your finger; if it feels soft and squishy, it's not done yet.
Common Mistakes to Avoid
Here are some common mistakes to avoid when grilling London broil:
- Not letting the meat rest: Make sure to let the meat rest for 5-10 minutes before slicing to allow the juices to redistribute.
- Not adjusting for grill temperature: Adjust the cooking time based on the actual grill temperature, not the temperature you set.
- Overcooking: Don't overcook the meat, as it will become dry and flavorless.