Pule cheese or magareći sir, is a Serbian cheese made from 60% Balkan donkey milk and 40% goat's milk.
[1][2] The cheese is produced in Zasavica Nature Reserve.
Pule is reportedly the "world's most expensive cheese", fetching US$1300 per kilogram.
[3][4][5] It is so expensive because of its difficulty to produce, and its rarity: there are only about 100 jennies in the landrace of Balkan donkeys that are milked for Pule-making and it takes 25 litres (6+1⁄2 US gal) of milk to create one kilogram (2 lb 3 oz) of cheese.
[3][6] The taste of Pule cheese is reputed to be similar to that of manchego, a combination of nutty and earthy flavours, accompanied by a crumbly texture.