Proximate composition and functional properties of composite sorghum-okara flour and sensory evaluation of local snack product (sosa)

Abstract

Partial substitution of cereals with legumes has the potential to improve the nutritional content, functionality and other properties of the composite flour. This study aimed at ascertaining the effect of partially substituting sorghum flour with okara flour and also to access the acceptability of a snack product, sosa, produced from the flour blends. The blends were produced from sorghum and okara flour using the following proportions respectively; 100:0; 90:10; 80:20; 70:30; and 60:40 with 100% sorghum serving as control. Results of the proximate composition of the flour blends showed an increase in protein (8.18%-22.73%), fat (1.7%-5.53%), crude fiber (2.9%-11.55%) and ash (1.72%- 2.83%), while the carbohydrate content decreased from (73.21% to 46.55%), with the moisture content varying between (10.81% and 12.41%). Bulk densities decreased with increase in okara substitution from 1g/ml to 0.72g/ml. The water absorption capacity and oil absorption capacity increased with increase in okara substitution from 278.67ml/100g to 328ml/100g and 177.33ml/100g to 249.33ml/100g respectively. The flour blends produced can all serve as thickeners and the local snack (sosa) produced from the flour blends was favourably accepted by the panelists. Keywords: Local snacks: supplementation: sorghum-okara: composite flour.