Picón Bejes-Tresviso is a blue cheese made with cow's, sheep's and goat's milk, produced in Cantabria, in the north of Spain. It is made by loosely placing hazelnut-sized curds in the mould, allowing sufficient air to circulate and start the growth of Penicillium mould.
The cheese is then salted and dried for 12 and 18 days, at a temperature between 15 and 18 °C (59 and 64 °F). Picón Bejes-Tresviso has a thin, grey to yellow-green rind and is white, smooth and compact on the inside. It has teal-colored veins and a powerful, slightly spicy and tart flavor.