A device for cooking food on a grill has opposed upper and lower platens wherein a gap spacing between the platens is automatically adjusted in an initial stage and in subsequent stages of the cooking time for the food. The food is caused to be located between two opposed platens, the opposed platens each having opposed cooking surfaces and the opposed cooking surfaces defining a gap spacing that is adjustable. A controller and drive mechanism adjust the gap spacing between the platens so that during an initial stage of the cooking the gap spacing is equal to or less than the nominal initial uncooked thickness of the food, and during one or more subsequent stages of the cooking, after the initial stage, the gap spacing between the platens is varied.