Gorgonzola Gorgonzola Gorgonzola (; ) is a veined Italian blue cheese, made from unskimmed cow's milk. It can be buttery or firm, crumbly and quite salty, with a "bite" from its blue veining. Gorgonzola has been produced for centuries in Gorgonzola, Milan, acquiring its greenish-blue marbling in the 11th century. However, the town's claim of geographical origin is disputed by other localities. Today, it is mainly produced in the northern Italian regions of Piedmont and Lombardy. Whole cow's milk is used, to which starter bacteria are added, along with spores of the mold "Penicillium glaucum". "Penicillium roqueforti", used in Roquefort cheese,
Blue cheese Protetta. Blue cheeses with no protected origin name are designated simply "blue cheese". The main structure of the blue cheese comes from the aggregation of the casein. In milk, casein does not aggregate because of the outer layer of the particle, called the “hairy layer.” The hairy layer consists of κ-casein, which are strings of polypeptides that extend outward from the center of the casein micelle. The entanglement of the hairy layer between casein micelles decreases the entropy of the system because it constrains the micelles, preventing them from spreading out. Curds form, however, due to the function that the