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 curd-air interface. In pressing the cheese, the curds are not tightly packed in order to allow for air gaps between them. After piercing, the mold can also grow in between the curds. Blue cheese Blue cheese is a general classification of cheeses that have had cultures of the mold "Penicillium" added so that the final product is spotted or veined throughout with blue, or blue-grey mold and carries a distinct smell, either from that or various specially cultivated bacteria. Some blue cheeses are injected with spores before the curds form, and others have spores mixed in with the curds after