A mixing vessel, that is used with a motorized food processor, has a vessel wall with an cylindrical upper section and a frustoconical lower section. The upper section has a longitudinal axis generally centered within the upper section and an upper opening defining an upper end of the vessel wall. The lower section is tapered towards a lower circular opening defining a lower end of the vessel wall and has contiguous cambered protuberances defining a hypocycloidal inner surface within the lower section. A base removably closes the lower circular opening and has an upwardly tapered structure and a vertical rotational spindle. A blade assembly is locatable on the spindle. The blade assembly has a pair of upwardly extending blade arms, a pair of radially extending blade arms, and a pair of downwardly extending blade arms.