When preparing the patties, be sure to press down in the center of the patty with your thumb. This helps the burger to cook evenly, retain its shape, and avoid shrinking and drying out as it cooks.When mixing together the patties, use your hands. This might get messy, and you’ll need to wash them in hot soapy water straight afterward, but this is by far the best way to do it. The ingredients will combine smoothly and maintain the consistency you want from a burger. If you’re really worrie...