Cooking appliance comprising: - a housing comprising a cooking vessel configured to receive food to be cooked, - a cover pivotably mounted on the housing between an open position, wherein the cover releases access to the cooking vessel and a closed position, wherein the cover prevents access to the cooking vessel, - a steam outlet opening, - a steam outlet valve which is movable between a first valve position, wherein the steam outlet valve releases the steam outlet opening and connects the inside of the cooking vessel with the outside of the cooking appliance, so as to enable a steam outlet outwards from the cooking appliance, and a second valve position, wherein the steam outlet valve blocks the steam outlet opening, so as to enable an increase in pressure in the cooking vessel, - a cover locking mechanism configured to lock the cover in the closed position, and - a control member movably mounted on the cover and configured to be handled by a user and to control a locking and an unlocking of the cover with respect to the housing, the control member being configured to occupy: - a first control position, wherein the cover is unlocked with respect to the housing and the cover can be moved in the open position, - a second control position, wherein the cover is locked in the closed position and the steam outlet valve is held in the first valve position, and - a third control position, wherein the cover is locked in the closed position and the steam outlet valve is held in the second valve position, characterised in that said cover locking mechanism comprises a rotary ring comprising teeth arranged to interact with teeth distributed over the edge of the cooking vessel, so as to lock the cover in the closed position on the cooking vessel. - a housing comprising a cooking vessel configured to receive food to be cooked, - a cover pivotably mounted on the housing between an open position, wherein the cover releases access to the cooking vessel and a closed position, wherein the cover prevents access to the cooking vessel, - a steam outlet opening, - a steam outlet valve which is movable between a first valve position, wherein the steam outlet valve releases the steam outlet opening and connects the inside of the cooking vessel with the outside of the cooking appliance, so as to enable a steam outlet outwards from the cooking appliance, and a second valve position, wherein the steam outlet valve blocks the steam outlet opening, so as to enable an increase in pressure in the cooking vessel, - a cover locking mechanism configured to lock the cover in the closed position, and - a control member movably mounted on the cover and configured to be handled by a user and to control a locking and an unlocking of the cover with respect to the housing, - a first control position, wherein the cover is unlocked with respect to the housing and the cover can be moved in the open position, - a second control position, wherein the cover is locked in the closed position and the steam outlet valve is held in the first valve position, and - a third control position, wherein the cover is locked in the closed position and the steam outlet valve is held in the second valve position, characterised in that said cover locking mechanism comprises a rotary ring comprising teeth arranged to interact with teeth distributed over the edge of the cooking vessel, so as to lock the cover in the closed position on the cooking vessel.