Apparatus for cooking food products on both sides thereof, including a base member (2) associated to a bottom heating surface (3) adapted to support food products to be cooked, an upper member (4) associated to a top heating surface (5) and joined in an articulated manner to the base member (2) so that, when the upper member (4) is displaced towards the base member (2), the top heating surface (5) comes to lie opposite to the bottom heating surface (3) so as to enclose the food products therebetween. The upper member (4) is adapted to close in onto the base member (2) so as to form a cooking cavity (6) containing the heating surfaces (3, 5), wherein the cooking cavity (6) defines a radiation shield capable of retaining the microwaves inside the cooking cavity (6) itself.