Castello cheeses remarkable popularity both in Denmark and abroad.” Castello was acquired by Arla Foods, who expanded Castello into cheese markets in North America. Castello blue cheeses were developed in the 1960s. The curds are dipped into salt water, drained, and put into molds. The cheese is punctured with tiny holes and then brought into the ripening room, where it stays for about 15 days. It is then washed, cut, packed, and put in a "cooling room" for about a week at a temperature close to freezing. The washed rind hosts various molds that add to the cheese's mildly spicy flavor. It
Shropshire Blue Blue, is now also being made in the county of Shropshire in a small artisan dairy. Ludlow Blue uses carotene as a colouring agent rather than annatto, which makes the colour more yellow. Shropshire Blue is a blue cheese made from pasteurized cows' milk and uses vegetable rennet. The orange colour comes from the addition of annatto, a natural food colouring. "Penicillium roqueforti" produces the veining. The cheese has a deep orange-brown, natural rind and matures for a period of 10–12 weeks with a fat content of about 48 per cent. Made in a similar way to Stilton, it is