Jul 7, So most blues are pierced (or "veined") so air can work its way inside the cheese, which is what causes the blue veins throughout the cheese's. Jul 7, The blue veins are created by piercing the cheese with stainless steel needles all the way to the core. The whole process takes approximately 9. We don't sell the bland blue cheese you find at the grocery store. Shop more than 50 fine, gourmet blue cheeses from around the world at frogcitycheese.com!. Home -Our cheeses -Blue vein cheeses. Blue vein cheeses. Blacksticks Blue. Lancashire, England, UK. Cow's milk - Vegetarian - Pasteurised. From £ Feb 11, If you think you don't like blue cheese, these 3 might change your mind. Blue cheese is a general classification of cheeses that have had cultures of the mold . Penicillium roqueforti creates the characteristic blue veins in blue cheese after the aged curds have been pierced, forming air tunnels in the cheese.