Appliance for foaming beverage or foodstuff

A method of foaming a liquid for consumption using an appliance operable to generate a rotating magnetic field for an electrical rotating machine, the appliance comprising a stator comprising at least one circuit board with electrically conductive portions formed thereon, the electrically conductive portions connected with a multiphase configuration, wherein the electrically conductive portions comprise first electrically conductive portions arranged on a first face of the at least one circuit board as a plurality of first elements, at least one of the plurality of first elements comprising a radially extending radial portion having connected at a proximal end thereof a proximal portion, the proximal portion extending therefrom with a directional component in a first angular direction, and connected at a distal end thereof of a distal portion, the distal portion extending therefrom with a directional component in a second opposed angular direction, whereby proximal and distal are defined relative the center of rotation of the magnetic field and said angular direction is defined about said center of rotation;

• and the electrically conductive portions further comprising second electrically conductive portions arranged on a second face of the at least one circuit board as a plurality of second elements, whereby the proximal portion of the second elements extends with a directional component in the second opposed angular direction and the distal portion of the second elements extends with a directional component in the first angular direction, the method comprising:
• generating the rotating magnetic field by applying electrical energy to the electrically conductive portions of the stator;
• and
• rotating a rotary agitator arranged in a container for container liquid by applying a torque from the rotating magnetic field to the rotary agitator.