Textural properties of extruded snack products formulated with deboned poultry meat and brewer’s spent grain

Abstract The incorporation of protein- and fibre-rich ingredients into starch-based extruded snacks is of interest for obtaining healthy products. However, development of this type of product has been limited, since protein and dietary fibre have negative effect on textural properties of extruded snacks. In the present study, response surface methodology was used in order to evaluate the effect of different ratios of mechanically deboned poultry meat (MDPM) and brewer’s spent grain (BSG), as well as screw speeds, on hardness, firmness and crispiness of the extrudates produced. Regression analysis showed that BSG and screw speed had significant effects on all textural parameters, while MDPM had a significant effect only on the crispiness of snack products.