The various non-limiting embodiments of the present disclosure relate to a protein-based binder or coating system for particulate- and/or powder-type food systems, for example, to form nutritive ready-to-eat food bars, protein bars, snack pieces, or cereal clusters, where the binder comprises a modified wheat protein isolate. Other non-limiting embodiments relate to food compositions comprising a modified wheat protein isolate binder, and at least one of food particulates; powdered food ingredients, such as protein powders; and combinations thereof. In addition, methods for forming the various non-limiting embodiments of the food compositions and the modified wheat protein isolate binder systems are also disclosed.