The compact system consists of a tiltable vessel, equipped with a double jacket. The vessel can be closed hermetically by a pneumatically operated lid. The mixing arm is driven by a shaft through the bottom of the vessel. It is equipped with scrapers following the shape of the wall. Deposits on the inner vessel surface are avoided. Direct steam can be injected by means of nozzles in the bottom. The special geometry of the steam nozzles ensures an even distribution of hot steam in the product. The double jacket can be used for indirect heating or cooling. For optimized charging with raw material the system is equipped with a special charging device. The tiltable vessel can be moved into three positions. The charging position (tilt angle into charging device direction) allows easy access for standard containers. The working position (Stephan specific inclination) allows gentle but effective mixing. The discharge position (tilt angle opposite to charging position) supports easy emptying into standard containers. Discharging can be done through the discharge valve or through the opened lid. A sieve integrated in the lid enables discharge of cooking water through the valve.