Milk frother appliance

An appliance for preparing frothed milk is dockable onto a drinks preparation machine and, for this purpose, includes at least one connection for steam produced by the drinks preparation machine, as well as an interface for electrical current supplied by the drinks preparation machine. The appliance also includes a milk frothing unit with a gear pump. The gear pump at an inlet side is connected to a milk feed conduit and to an air feed. The milk frothing unit is configured such that an operating parameter is adjustable in a manner depending on a measured value and/or on a user input.