Food-preparation device comprising: - a case, - a container mounted on the case and arranged to receive food to be prepared, - at least one movable working member disposed in the container and arranged to work on the food received in the container, - a motor disposed in the case and arranged to move the movable working member, - a removable lid that provides the container with a closed state wherein the container is closed by the lid, - means for locking the lid on the container, - the lid being arranged to be moved when the container is in its closed state between: - an unlocked position on the container, wherein the lid is cleared of the means for locking, and - a locked position on the container, wherein the lid cooperates with the means for locking, characterised: in that the food-preparation device comprises means for securing the locking of the lid, said means for securing the locking comprising: - at least one locking member mobile between a first position wherein the movement of the lid from the locked position to the unlocked position is authorised, and a second position wherein the locking member prevents the lid from moving from the locked position to the unlocked position, - a gear motor to move the locking member between the first position and the second position. - a case, - a container mounted on the case and arranged to receive food to be prepared, - at least one movable working member disposed in the container and arranged to work on the food received in the container, - a motor disposed in the case and arranged to move the movable working member, - a removable lid that provides the container with a closed state wherein the container is closed by the lid, - means for locking the lid on the container, - the lid being arranged to be moved when the container is in its closed state between: - an unlocked position on the container, wherein the lid is cleared of the means for locking, and - a locked position on the container, wherein the lid cooperates with the means for locking, characterised: in that the food-preparation device comprises means for securing the locking of the lid, said means for securing the locking comprising: - at least one locking member mobile between a first position wherein the movement of the lid from the locked position to the unlocked position is authorised, and a second position wherein the locking member prevents the lid from moving from the locked position to the unlocked position, - a gear motor to move the locking member between the first position and the second position. - means for locking the lid on the container, - the lid being arranged to be moved when the container is in its closed state between: - an unlocked position on the container, wherein the lid is cleared of the means for locking, and - a locked position on the container, wherein the lid cooperates with the means for locking, - at least one locking member mobile between a first position wherein the movement of the lid from the locked position to the unlocked position is authorised, and a second position wherein the locking member prevents the lid from moving from the locked position to the unlocked position, - a gear motor to move the locking member between the first position and the second position.