A machine for making ice cream, comprising: - a production unit comprising a processing container for processing a liquid or semi-liquid base product, defining a processing chamber and provided with a stirrer rotating inside the processing chamber; - a thermal treatment system associated with the processing container for heating/cooling the processing chamber; - a feed device for feeding an additional product; - a first transfer channel configured to transfer the liquid or semi-liquid base product from the processing container to a dispensing section; - at least one second transfer channel configured to transfer the additional product from the feed device to the dispensing section; - a shutter movable between a closed position and an open position for, respectively, controlled opening and closing of the first transfer channel, and in which the second transfer channel is formed; - a containing body in which the shutter is slidably movable along a direction of translation and having an abutment portion configured to receive a head portion of the shutter at the closed position; - a drive and control unit; wherein the at least one second transfer channel is made internally of the shutter, the machine being characterized in that it further comprises a heating device which is associated as one with the shutter in such a way as to heat the additional product inside the at least one second channel and which is connected to the drive and control unit to be controlled by it, the heating device being an electrical device and being configured to promote fluidification of the additional product, the heating device being integrated in the shutter, the shutter comprising a pair of electrical connectors for connecting the heating device to an electrical energy source. - a production unit comprising a processing container for processing a liquid or semi-liquid base product, defining a processing chamber and provided with a stirrer rotating inside the processing chamber; - a thermal treatment system associated with the processing container for heating/cooling the processing chamber; - a feed device for feeding an additional product; - a first transfer channel configured to transfer the liquid or semi-liquid base product from the processing container to a dispensing section; - at least one second transfer channel configured to transfer the additional product from the feed device to the dispensing section; - a shutter movable between a closed position and an open position for, respectively, controlled opening and closing of the first transfer channel, and in which the second transfer channel is formed; - a containing body in which the shutter is slidably movable along a direction of translation and having an abutment portion configured to receive a head portion of the shutter at the closed position; - a drive and control unit; wherein the at least one second transfer channel is made internally of the shutter, the machine being characterized in that it further comprises a heating device which is associated as one with the shutter in such a way as to heat the additional product inside the at least one second channel and which is connected to the drive and control unit to be controlled by it, the heating device being an electrical device and being configured to promote fluidification of the additional product, the heating device being integrated in the shutter, the shutter comprising a pair of electrical connectors for connecting the heating device to an electrical energy source.