Physical, chemical and nutritional quality of extruded corn germ flour and milk protein blends

An expanded nutrient snack was prepared by extrusion cooking of defatted corngerm flour added with increasing amounts of milk proteins. Two extrusion temperatures (150 and 170°C) were considered. Physical, chemical and nutritional characteristics of the final product were evaluated. The products extruded at 150°C showed better expansion and crispness than the ones obtained at 170°C. A small addition of milk protein (5%) improves the organoleptic characteristics of the extrudates produced at 150°C. On the contrary the addition of milk protein has a negative influence on the product expansion and consistency of the samples extruded at 170°C.