Okara is a major agricultural waste that is generated from the processing of soymilk, tofu, and their derivatives. The production of 1000 L of soy beverage can result in 250 kg of okara. Based on soy beverage consumption, approximately 14 million tons of okara are estimated to be generated annually worldwide, with associated environmental problems [8]. In addition, okara spoils and putrefies naturally when not refrigerated because it has high water and protein contents [9]. Many studies have examined ways to use okara, some of which have involved developing okara as a processed food for humans. Several studies on okara have focused on its fermentation [10] and [11], its use for the extraction and purification of protein or oil [12] and [13], and its enzymatic digestion for animal feed [14] or mushroom medium.