Protected Designation of Origin (PDO), a demanding denomination, which guarantees quality and authenticity, intrinsically linked to the following characteristics.

The cheese is produced in the Serra da Estrela geographical region

It is made only with raw milk from native sheep, Serra da Estrela and/or Churra Mondegueira, fed exclusively on natural pasture from the geographical area of Serra da Estrela.

Only thistle flower and salt can be added to the milk.

The cheese, after the maturation period, is submitted to a tasting panel accredited by IPAQ and accredited tasters, which evalutes its flavour, texture, aroma, in strict compliance with the Serra da Estrela PDO production rules.