Barras de cereais contendo okara nas formulações

Abstract

The okara or soy pulp is a by-product of processing soy extract with low commercial value, which composition contains a high quantity of protein with high nutritional value and high rate of protein efficiency. The objective of this study was to determine and characterize cereal bars using okara in the formulation. Three formulations were developed, a standard one with 25% of dried okara (formulation 1), a second containing 17% of okara (formulation 2) partially replacing the wheat germ and the oat. The composition and technological properties were determined. Sensory analysis was performed to assess the flavor attributes, smell, texture and overall acceptance, as well purchase intent. The cereal bars, containing standard and okara did not differ significantly regarding the ashes, the lower moisture content was in the formulation 2, which presented okara smaller amount of added protein, the protein levels increased in formulations with addition of okara. Formulations 1 and 2 proved to be equal to the standard formulation regarding lipid content, although it was statistically significantly different from each other. The value of soluble fibers showed no significant difference, on the other hand, the insoluble fiber content increased in the formulations containing okara when compared to the standard formulation, showing that the presence of the residue significantly increased the insoluble fiber content of the cereal bars. The total amount of fiber increased with the addition of okara in the formulations. The VI and the IAO showed no difference between the formulations, unlike the IAA that presented higher values in the formulations with soybean residue, moreover, the density differed according to the percentage of okara added in the formulations. The aroma and global acceptance attribute had averages of 8.1 and 7.5, respectively "like" and "like moderately". Purchase intent analysis showed that Formulation 2 was more accepted. So it was possible to prepare cereal bars containing dried okara nutritionally superior to standard formulation, and sensory accepted.