Specific gravity (SG) provides an indication of the total air
holding capacity of the batter. Low SG values indicate good incorporation
of air, yielding a higher final volume after baking;
however, many other factors also affect this quality parameter (Frye
& Setser, 1991). The SG values of the different muffin batters are
shown in Table 2. A significant decrease in SG was found with
sucrose replacement by the PD-SC mixture, indicating higher
incorporation of air into the batter as sucrose was replaced. SG has
also been found to decrease in sponge cakes on replacing sucrose
with wheat starch, sorbitol and aspartame (Baeva et al., 2003).