Castello cheeses cheese, named Noble Blue Cheese, Extra Danish Creamy Blue (also available sliced), Soft Blue, and Crumbled Blue Cheese. In 2012, the Denmark's Finest Havarti Cheeses were added to the Castello brand, followed by Saga Blue Brie in 2013. The Alps Selection Cheeses; Hirten, Bergkase, and Weissbier, were launched in the United States in the end of 2012, and were the first of their kind available in the United States. In some markets, the name Blue Castello is used for a triple-cream blue cow's milk cheese. Castello was established in 1893 by Rasmus Tholstrup of Denmark. His son, Henrik, bought a
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