A cooking apparatus includes a housing defining a cooking chamber, a tray retainer protruded from a side of the housing and toward the cooking chamber, a cooking tray which is insertable into the cooking chamber and detachably engageable with the housing at the tray retainer, the cooking tray including a plurality of cooking surfaces defined at a first surface of the cooking tray, and an interference member protruding from a second surface of the cooking tray which is opposite to the first surface, and a plurality of heaters which provide heats of different temperatures to the plurality of cooking surfaces of the cooking tray.