A system configured to hydrate and process foodstuff materials can include an exterior tube, an inner shaft, and multiple water inlets. The exterior tube can have a foodstuff inlet, an outlet, and a longitudinal axis, and can facilitate the conveyance of foodstuff materials along a material passage from the foodstuff inlet to the outlet. The inner shaft can be located within the exterior tube, can extend along the longitudinal axis, and can combine with the exterior tube to define the material passage. The inner shaft can be configured to be rotationally driven and can include one or more particle resizing features extending therefrom. The multiple water inlets can be spaced apart along the length of the material passage and can be configured to provide water to the foodstuff materials at different locations along the length of the material passage as the foodstuff materials are being conveyed along the material passage.