Sensory Evaluation Results. Figure 2 showed that
addition of up to 20% SPI improved the taste of the cakes
significantly (P < 0.05), while further increase in the SPI
content, dramatically reduced the scores given to the taste
(P < 0.05). The panelist indicated that the cakes contained
30% SPI had undesirable mouthfeel. According to the panelists,
crust color was not affected by SPI at levels lower than
15%. Further increase in the SPI level resulted in lower
scores given to the cake color, possibly because of the darker
crust color. The scores given to these samples were significantly
different with each other (P < 0.05). Crumb color
remained unaffected by addition of up to 20% SPI (data
were not significantly different, P < 0.05), however, inclusion
of 30% SPI significantly decreased the crumb color
score (P < 0.05). The scores given to the cake texture
increased as the SPI content of the cakes increased to 20%.
However, addition of 30% SPI had adverse effect on the
cake texture. The overall acceptability of the cakes improved
with increasing SPI up to 20%, while it dramatically
reduced when 30% SPI was added. Apparently, darker crust
and crumb color and decrease in the cake softness were the
main reasons for the lower scores given to this sample