Abstract: Protein foods are made from cereals by (a) milling the cereal and steeping the milled material in water; (b) mechanically separating the mixture from (a) to produce a sediment (I) containing the major proportion of the insoluble material and starch A, and a suspension (II) containing at least 60% of the nitrogeneous material initially present; (c) subsequently separating the suspension (II) to form an insoluble fraction (III) containing at least 60% of the proteins initially present and a supernatant fraction (IV); (d) mixing the sediment (I) with the supernatant fraction (IV) to form a suspension (V) containing at least 90% of the starch initially preset; (e) hydrolyzing the starch in the suspension (V) by addings thermally stable amylase; (f) separating the hydrolysis mixture from stase (e) to provide a supernatant hydrolysate (VI) and an insoluble fraction (VII); (g) fermenting the insoluble fraction (VII) after suspending it in water to cause an enrichment in yeast protein and (h) separating the fermented