Cooking appliance for commercial kitchens in the form of a combi steamer 1, 1', with a cooking chamber (3) for cooking food which can be arranged on a plurality of cooking levels (32), a heating device for heating the cooking chamber
atmosphere, a device control for controlling the cooking appliance, a cooking chamber drain (33) which is located below a floor (4) of the cooking chamber (3) and serves to drain a fat-water mixture and gaseous components of the cooking chamber
atmosphere from the cooking chamber (3), wherein the cooking chamber drain (33) extends from a drain opening (15) in the floor (4) or in the floor area of the cooking chamber (3) to a
siphon device (35), wherein a fat collection device (59) is provided which comprises at least one fat collection container (61), at least one fat extraction line (73), at least one extraction pump (77) and at least one fat
discharge line (82), wherein the fat extraction line (73) extends from the fat collection container (61) extends to the suction pump (77),wherein the suction pump (77) is configured to convey the
grease-water mixture drawn in via the
grease suction line (73) to the
grease discharge line (82), and wherein the grease collection device (59) comprises a cleaning device configured to convey water at least via the grease suction line (73) and the grease collection container (61) into the cooking chamber drain (33) in the direction of the
siphon device (35).