Final answer:
Typically, you should flip a patty only once on the grill, cooking each side for 3 to 4 minutes, depending on the desired doneness and the heat of the grill.
Step-by-step explanation:
When grilling patties, the common practice is to flip each patty only once during the cooking process. The timing of the flip will depend on how well-done you prefer your patty to be, as well as the heat of the grill. For example, on a medium-high heat, you might cook a patty for about 3 to 4 minutes on one side, before flipping it to cook for another 3 to 4 minutes.
This single flip ensures that the patty cooks evenly and achieves a satisfactory sear on both sides without overhandling, which can cause it to fall apart or lose its juices, making it dry and less flavorful.