The optimal duration for preparing a London broil via barbecue methods is contingent upon several factors, including the thickness of the cut, the target internal temperature, and the heat output of the barbecue grill. Generally, a medium-rare result, which is often preferred, requires a shorter cooking time than a medium or well-done outcome. Example: A one-inch thick London broil cooked over medium-high heat (375-400F) will typically require approximately 5-7 minutes per side to reach an internal temperature of 130-135F for medium-rare.
Accurate assessment of cooking time is critical for achieving a tender and flavorful result. Undercooking the London broil can result in a tough, chewy texture, while overcooking can lead to a dry, less palatable product. Precise temperature monitoring using a reliable meat thermometer is paramount. Factors such as ambient temperature and wind conditions can also influence cooking times, necessitating adjustments to maintain consistent barbecue temperature.