A process for processing a powdered or granular product, in particular in the form of a food-stuff, especially a product for infusion such as coffee, tea, cocoa, chocolate, preparation for broth and others, involves adding a liquid to a predetermined portion of the product and applying energy to the predetermined portion of product. Moreover, a layer (12) of material is made to adhere to a corresponding face (13) of a pre-determined portion of the product.
