A device for foaming liquid foods in a container, particularly milk, is provided having a vapor generator for generating vapors, particularly steam, and a vapor lance to be at least partially inserted into the container, with the vapor lance being connected to the vapor generator in a fluid-guiding fashion and including at least one vapor outlet opening such that steam can be discharged from the vapor generator via the vapor lance out of the vapor outlet opening. The device further includes at least one motion element which is connected to the vapor lance and/or a holder for the container such that the vapor lance and the container are movable relative to each other via the motion element.