Abstract
The aim of this work was to formulate cookies using extruded flour from by-products of rice and common beans
industries, such as broken rice and split old bean grains, in order to make available foods with added nutritional value
as other options to consumers. The market of ready to eat and high quality products is increasing in the world
considering the new habits and life style of modern consumers. Different proportions of rice and black bean (whole –
WBF or peeled grain - PBF) pre-gelatinized flours were used to prepare the cookies by partially replacing the corn
starch in the original recipe. The samples were characterized for physicochemical and sensory parameters. The final
products showed an interesting nutritional composition. The increase of mixed flour on cookies formulation
contributed to an increase of vitamin B content. There was no tannin content detected in the final products and the
level of phytate was very low with no significant difference among samples. A significant difference between
products was observed for some colour parameters. The sensory analyses showed that consumers “liked lightly” the
cookies with 15% and 30% PBF and 15% WBF. Cookies formulated with WBF had lower acceptance by consumers
in terms of appearance and only those with 30% WBF had an intermediate score (“neither like, neither dislike”) for
global acceptability. Regarding texture, when a higher amount of both flour (PBF and WBF) was applied it was
observed an increase of cookie hardness and fracturability values. In conclusion it is viable to produce acceptable
cookies using a rice and black bean extruded flour and then diversify the application of these by-products generated
by their processing industries.