The process conditions were recorded during extrusion and SME was subsequently calculated. Some variations in the extrusion parameters were observed (Table 1) most notably the control sample showing a higher torque value than samples containing fruit. There were differences in the material temperature and pressure when comparing the control to the other products, with the SME for the control being higher than for the extrudates containing fruit powder. Variances in SME and torque were observed in a study of Dehghan-Shoar et al. (2010) when tomato paste powder and skin were added to corn, rice and wheat formulations. These variances were attributed to the lubrication effect of sugar and fibre in the paste powder and skins. It is probable that the fruit powder has had a similar effect but to differing degrees depending on the sugar and fibre content of the differing powders.