Food Flavouring and Coatings

Coating is an industrial process that consists of applying a liquid or a powder onto the surface of an edible product to convey new (usually sensory) properties. Coating designates an operation as much as the result of it: the application of a layer and the layer itself. Coating takes different meanings depending on the industry concerned.

Coatings can be added for the enhancement of organoleptic properties of a food product. Appearance and palatability can be improved by adding colour (white dragee, brown chocolate), changing the surface aspect (glazed sweets or rough, crispy nuggets); changing or adding tastes (sweet dragee, salted snack) or flavours (fruit-glazed sweet goods), or texture (breaded crispy nuggets). Coatings also can be used to add vitamins and minerals (enriched white rice) or food energy. The coating process begins with the application of the coating on the food product, but the end product must be stable throughout its shelf life. Therefore, a coating process is completed by a stabilizing process, either by freezing, cooling, heating or drying.