Double Gloucester cheese is a traditional, unpasteurized, semi-hard cheese which has been made in Gloucestershire, England, since the sixteenth century. Gloucester cheeses were at one time made only with the milk from Gloucester cows, which are now almost extinct. There are two types of Gloucester cheese: Single and Double. The main difference is that Single Gloucester is made with skimmed milk combined with a small amount of whole milk. Double Gloucester is made from only whole milk.