Abstract:Using low-gluten flour, soy sauce residue insoluble dietary fiber, maltitol, and butter as the main raw materials, the formula of soy sauce residue insoluble dietary fiber biscuits was optimized through single-factor and response surface methodology. When the addition amount of low-gluten flour was 96 wt.%, the addition amount of soy sauce residue insoluble dietary fiber was 4 wt.%, the addition amount of water was 35.89 wt.%, the addition amount of maltitol was 35 wt.%, the addition amount of butter was 11.39 wt.%, the addition amount of egg liquid was 15 wt.%, the addition amount of milk powder was 15 wt.%, the addition amount of baking soda was 1 wt.% and the addition amount of salt was 0.25 wt.%, the sensory evaluation score of soy sauce residue insoluble dietary fiber biscuits could reach 81.7, which was 17.55% higher than that before optimization. Quality analysis results showed that compared to the control group, the soy sauce residue insoluble dietary fiber biscuits exhibited lower L*, a*, and b* values along with reduced hardness, while demonstrating improved crispness. However, there was no significant difference in the test results of electronic nose and electronic tongue. In addition, soy sauce residue insoluble dietary fiber biscuits had a lower predicted glycemic index. Therefore, soy sauce residue insoluble dietary fiber biscuits have better quality characteristics, meet the public's pursuit of health, and have a promising market prospect.