What makes this burger press a flat-out success? For those who crave a great steakhouse burger, meat or veggie - at home - the Grill Friends Steakhouse Burger Press makes the job easy. This is the first burger press made with a thumbprint indentation to assure even cooking, so burgers don't round-out while they cook. The thumbprint is a little-known restaurant technique; the chef makes the patties and puts an indentation in the middle of the burger with his finger. As the burger cooks and the meat fibers expand, the hole is filled in and you have a perfectly flat, even burger, explains Grill Friends creator Elizabeth Karmel. This burger press makes the thumbprint for you, for better burgers every time.