Hydrocolloids effect on coating batter and on organoleptic properties of rissol regenerated in oven and comparison with deep-frying process

Abstract

Introduction: Consumers' preference for lower fat products continues to increase and there is a significant pressure on industry to reduce the use of frying processes. Objetives: Evaluate the effect of hydrocolloids on the Rissol coating, avoiding the pre-frying or frying processes. It’s also intended to compare physicochemical characteristics of the Rissol obtained, using oven regeneration process and traditional deep-frying, and consumer's acceptability of oven regenerated Rissol. Methods: Hydrocolloids such as carboxymethylcellulose, hydroxypropylmethylcellulose, methylcellulose, xanthan, karaya and locust bean gums, were used alone in the coating system at concentrations of 0.5% and 1.5%(w/w), as well as the synergies established between pairs of gums to a final concentration of 1%(w/w). Rissol was regenerated in the oven (200°C, 18 minutes) and instrumental texture, colour, moisture and organoleptic properties (quantitative descriptive analysis) were measured.The contents in protein, carbohydrates, total fat, fibre, sodium chloride and moisture and consumer’s acceptability in Rissol with 0.5%(w/w) of carboxymethylcellulose were determined, to compare deep-frying and oven cooking processes. Results: The addition of 0.5%(w/w) of any of hydrocolloids studied to the coating system offers better prospects to produce an oven product without pre-frying. The formulations with 1.5%(w/w) of hydrocolloid showed a poorer appearance with cracks and lumps.Conclusion: The use of carboxymethylcellulose in coating batter could be an alternative to obtain a product with reduced total fat and with positive consumer acceptability results (with oven regeneration).