How Defrosting Tray Works. It quickly and naturally transfers warmth evenly across the surface of food for the defrosting process. There is no miracle or magic about how defrosting tray thaws your steak, the tray is made of metal that conducts heat therefore it.
One way to make the board defrost food faster is to run hot water over it before placing the food on top. The cold temps in the meat (or other frozen food) are then transferred to the tray. This causes it to heat up quickly and also cool off quickly.