According to obtained micrographs presented in Fig. 4(a), (b) and (c) the structure was consisted presumably of small densely packed rice starch granules incorporated in interrupted protein and CMC matrix. The starch granules were intact in spite the thermal treatment due to insufficient amount of added water in all of the used cookie formulations. Moreover, micrograph of wheat flour‐based cookie (Fig. 4(d)) showed, as it was expected, much larger starch granules in comparison to rice starch granules