A household appliance in the form of a food processor has a controller that controls the preparation of a meal according to a sequence of prescribed steps that includes comminuting, mixing or heating the meal or ingredients. The controller is designed and set up to output a control command for controlling an external cleaning device depending on a progress of the sequence of steps. The control command to the external device includes a cleaning instruction for the external device to effect cleaning in an area where the household appliance is located.