The present invention relates to a method or processing technique as well as the product achieved there from for the manufacturing of high protein, high fiber, low carbohydrate snacks, cereals, and food items in which the end product will demonstrate low bulk density and/or a light crunchy texture. The product may be made up of mixtures of various sources of proteins such as Milk protein, Whey protein, Soya protein, Meat protein mixed with various portions of grains and hydrocolloids and processed in such manner where the product, utilizing the incorporation of various gasses into the plasticizing agent and then distributed within the matrix under low or high pressure such as cooking extrusion or forming extruder for the purpose of expanding the matrix of the food when exiting the die and the pressure is released. During the baking process, such expansion takes place when the gas infused plasticizer is distributed within the dough and further expands within the dough as it is being baked. The presence of heat further assists in the expansion of the dough by turning water into steam within the dough and expanding the gas within the plasticizer, thus resulting in the expansion of the food particle resulting in final very light crunchy texture product thus achieving a very low bulk density.