Mantequilla de Soria is a high-quality butter made from the local Friesian or Pardo-Alpina cows' milk in the province of Soria. The color of Mantequilla de Soria ranges from ivory to straw yellow, and the taste is slightly acidic and reminiscent of fresh cream.
The butter comes in three varieties, natural, salty and sweet, depending upon whether salt or caramelized sugar syrup is added to the butter. After skimming the milk and beating the cream, lactic ferments are added after 3 or 4 hours after the start of the ripening to achieve a smoother and silkier butter.