Double-walled cover for cooking food

A cover having a double wall for cooking food which is placed over a burner comprising an outer wall in the shape of a bell, a manipulation knob located on said outer wall, an inner wall in the shape of a bell, a plurality of spacers located between said outer wall and said inner wall to secure said walls together in spaced relation, a first chamber for conserving the heat emanating from said burner defined by said inner wall which is open at its lower end only, and a second chamber substantially surrounding said first chamber defined by said inner and outer walls which is open at its lower end only to admit hot air thereinto, the first chamber being in direct communication with heat rising upwardly from said burner, and each of said walls of the cover including a metallic layer with a thermal insulating layer, each of the walls of the cover including three layers, the intermediate layer being thermally insulating and the two outer layers being metallic, and a kettle and a lid therefor, an adapter secured to the upper inside portion of said cover and the top of said lid to secure said lid to said cover, the lower edges of said cover being at the same level as the bottom of said kettle when resting upon a grate placed upon said burner which supports said cover and said kettle.