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Abstract
Soy okara, a by-product of soy milk processing, is often underutilized
or unutilized. The research was carried out to assess the potential of
incorporating okara in bakery products to improve the nutritional
quality. Fresh okara was dried, ground and sieved to obtained fine
flour. The okara flour was then incorporated in bun making by
substituting with wheat flour at 5, 10 and 15%. The standard method
for bun preparation was used without changing the other ingredients.
The developed buns were then analysed for their sensory, physical
and nutritional quality. By far much better, the results improved the
proximate composition of the buns. Proteins, fat, ash and fibre were
increased while carbohydrate content was reduced greatly with
incorporation of okara flour. The addition of okara flour at higher
percentages greatly reduced the physical characteristics (volume,
specific volume, height and dough raising capacity) values of the buns
due to the dilution of the gluten network and increased fibre content.
The sensory parameters of colour and appearance, aroma and taste
were not significantly different from control buns while elasticity
and texture score rating were greatly reduced. Overall, the buns were
accepted at 5% level of incorporation which could be increased by
using bread improvers to improve the physical properties. The use of
okara flour can therefore be used in buns and other bakery products to
improve the nutritional quality and help in food security.