The aim of this study was to produce a suitable cake with reduced fat with the help of apple pomace fiber as a fat substitute. After preparing fiber from apple pomace by water extraction method, first some properties of this fiber were evaluated. Due to the low amount of fat and energy and the amount of crude fiber, the extracted apple fiber was able to replace carbohydrate-based fat for flour products. In this study, optimization of the cake production process by three factors, including apple fiber with a ratio of (0.5, 10%) and oil (16.38, 15.47, 14.57%) with a shelf life of 0, 15 and 30 days. Response method was performed. The result showed that with increasing the amount of fiber moisture, fat, firmness and adhesion, the springiness of the cakes increased and the volume decreased. With increasing shelf life, moisture, fat, aw increased and the firmness and stickiness of cake spring decreased. The results of this study show that the cake containing 5.163% fiber and 14.9% oil in 8 days was the best sample. The results showed that the use of apple pomace in the cake reduced the fat content by 9.3% compared to the control sample. According to the optimization results, the optimum sample moisture content is 22.847%, water activity 0.850%, fat 15.018%, specific gravity 82.737 cm3/g, hardness 10809 (N), spring content 0.747 cm and the amount of adhesion was determined to be 0.392.
The current study is aimed to compare the effect of fat and/or wheat-flour substitution with apple pomace on the physicochemical and shelf-life of oily cakes. The sensory quality of samples was evaluated using the Delphi-Fuzzy logic method. The oily-cakes include the following: TCO: control; T W 10 % and T W 20 % : flour substitution with apple pomace (10 and 20% w/w); TO10% and TO20%: fat substitution with apple pomace (10 and 20% w/w); T W & O 5 : 5 and T W & O 10 : 10 : fat and wheat-flour substitution with apple pomace (5 : 5 and 10 : 10% w/w). The lowest and highest protein content were recorded for T w 20 % (10.0 ± 0.12%) and TO20% (11.0 ± 0.45%) ( p < 0.05 ). There was no significant difference between the fat content of control samples with T W 10 % , T W 20 % , and T O & W 5 : 5 ( p > 0.05 ). T W 20 % exhibited the highest fiber content (2.12%) and the lowest caloric (385.0 kcal/100 g) values. There was a significant difference between baking loss of TO10% (9.87%) and TO20% (9.36%) samples with control one (11.6%) ( p < 0.05 ). By reducing the fat content, smaller and lower porous was observed. The antioxidant and antimicrobial potential of apple pomace was not significant. Therefore, apple pomace had no significant effect on the shelf-life of cakes. Based on defuzzification values, the sensory ranking of samples was as follows: T C O 64.4 > T W 20 % 63.9 > T W & O 5 : 5 63.7 > T W 10 % 63.6 > T O 10 % 60.2 > T W & O 10 : 10 60.1 > T O 20 % 58.8 . Overall, apple pomace could be considered a cost-effective, sustainable, and healthy alternative to partial wheat-flour. Further research is required to produce reduced-fat cakes. Adding fruit powder along with fat replacers can be suggested for future studies.
Producing quality products in baking industry has been facing several challenges including meeting the needs of the growing population, lack of sufficient water resources for producing enough wheat, lack of quality products made from wheat flour and high amount of waste. Recently, the quality of baking products has been improved by mixing different types of flour, which increases the nutritional value and improves the quality of the final product. This study evaluates the possibility of making a cake by incorporating wheat flour with quinoa and okra flour. Moreover, basil gum is used to improve the gluten network. The cake samples were prepared with quinoa flour at two levels (15 and 30%), okra flour at two levels (0.8 and 0.16%) and basil gum at a level of 0.4%; finally, their physicochemical, rheological, SEM, and sensory properties were evaluated. Based on the results, adding quinoa and okra flour and basil gum increases the density and consistency of the batter. Hardness, springiness, chewiness, cohesiveness, and adhesiveness of the blend Q2B1R was improved. The granule structure of the quinoa flour cakes were affected, and the gluten network was not well formed as shown in the electron microscopy images. However, the gluten network was improved in the samples with 0.4% basil gum and 0.8% okra flour. By adding okra and quinoa, better specific volume, porosity, and moisture content was obtained. Sensory evaluation of the cakes indicated that the blend Q2B1R was scored close to the control sample.
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