Abstract: A device for heating and frothing milk which has a steam generator and a jet pump is provided. The jet pump has a steam inlet through which pressurized steam is injectable into the jet pump, a first suction inlet and a second suction inlet. The first suction inlet is configured to connect to a milk reservoir. An air inlet is connectable or connected to the second suction inlet of the jet pump for drawing air into the jet pump. A bypass valve is connected to the second suction inlet of the jet pump and has a bypass inlet. The bypass valve is switchable between a first position in which the second suction inlet of the jet pump is shut off from the steam generator, and a second position in which the second suction inlet is in fluid communication with the bypass inlet of the bypass valve for suction of steam.