The blending of sweet potato flour, maize starch, soybean flour and xanthan gum gave the flours a longer paste peak times, and hence swelled more gradually and not as susceptible to mechanical damage (Wiesenborn et al., 1996). Setback ratio, which is an indication of starch retrogradation tendency after gelatinization, was significantly lower (P < 0.05) in composite flour than those in wheat flour.