Three dry components were used in the mixtures, i.e., DPP, EPP and amaranth flour (AF) (X1 þ X2 þ X3 ¼ 1 or 100%). The ingredients examined in the study were expressed in pseudo-components. Fresh spaghetti samples were formulated according to the experimental design shown in Table 1. In total, 18.8 mL water and 56 g fresh egg per 100 g mixture were added to all formulations. Initially, the dry ingredients were mixed manually, and then the egg and water were added.