Abstract: An apparatus includes a housing, a heat conductive container for receiving yogurt ingredients, a heating unit installed in the housing and provided with a heating element for heating the container, a cooling unit installed in the housing and provided with a refrigerant pipe for cooling the container by a refrigeration cycle caused by supplying electric power, a stirring unit provided with a stirring blade which is driven by a motor to be rotated in the container, and a control unit configured to selectively control the heating unit, the cooling unit and the stirring unit to make frozen yogurt of the yogurt ingredients. A method includes steps for preparing frozen yogurt using the apparatus, wherein the frozen yogurt is fermented, ripened and frozen under control of the control unit within a single container, for example. In alternative examples, other fermented yogurt and non-fermented ice cream or sherbet products are made using the same apparatus.