An arrangement is disclosed for mixing of particulate filling material into a consumer ice mass. The arrangement comprises a housing with at least one supply opening for the consumer ice mass, at least one inlet for the filling material to a cavity in the housing, an outlet opening, and a rotor cylinder with one or more rotor blades for the mixing-in of the consumer ice mass and the filling material by rotation. The rotor blades create a number of cells in the cavity by being pressed against the surface of the cavity. The rotor cylinder is supported from two opposing sides of the cavity by bearings in the form of a rear bearing and a front bearing. Furthermore, a rotor blade for use in such an arrangement and a method using such an arrangement are disclosed.