Casein based puffed products, their preparation and their use in food products. These casein based puffed product include a matrix made of extruded and expanded casein salt and additional nutritional elements which are dispersed throughout the matrix mass. They can be used for providing or delivering additional nutritional elements within the food products, for example as inclusions in food products such as dry food products like cereal flakes or bars, chocolate or confectionery, or wet food products such as ice-creams, milk based desserts or chilled dairy products like yogurts, curds or fresh cheese. A process for their preparation and food products comprising the casein based puffed product are also disclosed.