The results of the rheological characteristics indicate that
the higher level of soybean flour reduced the peak viscosity
(PV), hot paste viscosity (HPV), break down viscosity (BD),
cold paste viscosity (CPV), and setback viscosity (SB) of composite
flour. This is due to the existence and interaction of
components like fat and protein from soybean flour with sweet
potato flour and maize starch that decrease the viscosity
(Dautant et al., 2007). In general the viscosity of composite
flour was lower than wheat flour. Sweet potato flour has the
lower viscosity than wheat flour, but maize starch has a higher
viscosity than wheat flour. There was a change in the pasting
profile of the composite flour compared with its raw material