The present invention relates to a method for treating a viscous mass comprising solid components in a grinding system, especially a fatty mass with solid components, said grinding system comprising a mixer and a grinding device, said method comprising the steps of: feeding into a mixer the mass to be treated； repeatedly circulating the mass to be treated by means of a displacement device from the mixer through a supply pipe to the grinding device and through a return pipe back to the mixer for reducing the size of said solid components in said grinding device； and further comprising the step of: removing from the system at least part of the treated mass through a branch-off provided in the return line when a predetermined grinding fineness has been obtained； and feeding into the mixer a new mass to be treated and at least partly displacing the new mass to be treated in said grinding device by means of said displacement device and as a consequence removing at least another part of said treated mass from said system.
