High Quality Content by WIKIPEDIA articles! Yarg is a semi-hard cow`s milk cheese made in Cornwall, United Kingdom from the milk of Friesian cows. Before being left to mature, this cheese is carefully wrapped in nettle leaves to form an edible, though mouldy, rind. The texture varies from creamy and soft immediately under the nettle coating to a Caerphilly cheese-like crumbly texture in the middle. Modern production is at Pengreep farm near Truro, by Lynher Dairies from an old recipe. "Yarg" is simply "Gray" spelled backwards, after Allan and Jenny Gray, the couple who gave the recipe to Pengreep Farm in the 1970s.