With the purpose of obtaining dehydrated rice-soybean porridges with good rheological and sensory properties when reconstituted, rice and soybean were mixed using the following proportions (w/w): 100:0, 90:10, 80:20, 70:30, 60:40 and 50:50%, respectively. The process steps included: soybean seeds dehulling, blanching, disintegration of blanched rice and soybean, homogenization and spray drying. The obtained dehydrated porridges were reconstituted in water in a 1:9 (mixture:water) proportion, and then evaluated for their compositions, trypsin inhibitor activity and rheological properties. With the exception of the control (0% soybean), all reconstituted porridges were submitted to sensory evaluation regarding to their appearance, consistency and flavor. The results indicated that all reconstituted porridges (0 to 50% soybean) presented pseudoplastic behavior. Porridges containing 20, 30, 40 and 50% soybean showed better consistency. Those containing 30, 40 and 50% soybean showed better appearance and flavor. These reconstituted porridges were then formulated with 6% sugar, 0.2% salt and 0.6% flavor (vanilla and coconut) and evaluated for consumer preference. Results indicated that formulated porridges containing 40 and 50% soybean, flavored with vanilla, were preferred. From those with coconut, only the one containing 40% soybean was acceptable. No activity of trypsin inhibitor was detected.
rheological properties; sensory properties; mixture of rice and soybean; reconstituted rice-soybean porridge
