. Conclusion
Cookies formulations were developed using sesame peels flour at different replacement levels of wheat flour. Texture analysis of dough revealed that, the addition of sesame peels flour affected the quality of dough in terms of hardness, cohesion, adhesion and breaking strength. Cookies supplemented with sesame peels flour showed interesting physical properties with lower moisture content and higher spread factor than those made by white wheat flour. But, their hardness increase with the increase of the replace- ment ratio and their color becomes indesirable. Interestingly, sen- sory results indicated that cookies supplemented with sesame peels flour were acceptable at a level that not exceeds 30% of incor- poration. By the addition of B. subtilis SPB1 biosurfactant at 0.1%, the dough texture profile was significantly improved and the action of this bioemulsifier was more pronounced than the glycerol monostearate, a commercial emulsifier used as a positive control.