The ideal temperature for cooking burgers is medium-high heat, at about 350°F (177°C). You want to achieve this temperature with about 15 minutes per side, totaling 30 minutes for two medium burgers. Remember that it takes time for your grill to heat up, so make sure you allow yourself enough time to complete your meal before it gets cold. You should also make sure that your grill is completely preheated before you begin cooking. This ensures that your burgers will cook evenly and quickly. If you have an electric grill, then preheat it before putting your burgers on. This will help keep them from getting cold too quickly. If you have a charcoal grill, then use lump charcoal instead of briquettes, as briquettes can cause uneven heating and burning of your burgers.