The process response data is provided in Table 3. Increasing feed moisture decreased torque, pressure and specific mechanical energy (SME). The high moisture reduced viscosity of the dough melt in the extruder and thus less energy was required for it to be pushed through the extruder. Water acts as a plasticizer, reducing the viscosity and the mechanical energy dissipation during extrusion (Akdogan, 1996, Ilo et al., 1996, Ortiz et al., 2010 and Selani et al., 2014).