Abstract: An apparatus for processing, such as grinding, crushing or otherwise comminuting and/or mixing, foodstuffs includes, as its main constituents, a foodstuff processing device of the type originally equipped merely with a hand crank for manual operation, an external power drive, and a transmission unit interposed between the former and the latter and transmitting torque between the two. The transmission unit includes a worm and a worm wheel accommodated in a transmission casing and meshing with one another, with the worm being driven by the power drive, such as a power drill, and the worm wheel driving the food processing device. The transmission unit is secured to the device so as not to move relative thereto, and the power drive is connected to the transmission casing so as to retain its position relative thereto and hence also to the foodstuff processing device.