Abstract: In a food processor with a power base having a bowl supporting portion and driven shaft extending vertically therefrom, an adjacent upstanding motor-containing housing of bowl height with a bowl on the portion containing a cutter on the shaft and an internal switch controlled motor energizing circuit, there is provided an improved interlock system comprising a bowl lid with structure operatively securing the lid to the bowl opposite the motor housing when the lid is rotated axially of the shaft toward the housing. A housing opening at lid height is provided opposite the securing structure and a probe-carrying arm on the lid is movable into the opening on lid rotation.