Optimization of Microwave-Assisted Predrying and Deep-Fat-Frying Conditions to Produce Fried Carrot Slices.

Main objective of the current study was to reduce the fat content of fried carrot slices by applying a microwave assisted drying (MAD) step before frying. The effects of MAD and deep-fat-frying conditions on moisture and oil contents, breaking force, and color parameters of predried and fried carrot slices were investigated. The results of data analysis using response surface methodology showed that there was a significant correlation between investigated responses and process variables ( P ≤ 0.05). Based on the optimal conditions (12% for weight loss, 140°C for frying temperature, and 227 s for frying time), more than 18% reduction in fat content of fried carrot slices was achieved by MAD applied before frying. SEM analysis was performed to determine the relationship between fat absorption and structural changes under effects of conditions of the proposed MAD and frying. Practical Applications Deep-fat-frying is one of the most common cooking methods for foods. There are plenty number of studies devoted to manufacturing of fried foods with reduced fat content, since concerns about high fat content rise for food manufacturers from an economic point of view and also for the consumers from the health angle. The information presented in this work will be useful in manufacturing of fried carrot slices of acceptable quality attributes by optimizing the MAD and frying processes. The result is very useful for manufacturer and consumers in considering different processing variables and responses at the same time, which have been commonly studied with single factor experiment in literature and none of them has included MAD combined frying for cooking of carrot slices in terms of fat content and quality assurance. [ABSTRACT FROM AUTHOR]