A good tip I learned from my friend Chef Mark is that when using any pan with any type of heat source (oven/range/gas), never put your burger into direct heat from any type of source because this can result into fast burning as well as unevenly cooked burgers which make them chewy instead of juicy on one side or one side getting all crispy while other side gets cooked really well leaving it raw inside . You should always preheat pan before placing burger into it as well as using high heat from gas range (which we are assuming you have already turned off) then place burger on pan . Preheat grill grate also if you plan on using grill grate . If you are not planning on grilling at all , just leave grill grate off until burgers get ready . After flipping burgers do not turn on oven/gas burner . It might end up being unevenly cooked again .