Nøkkelost (Norwegian: "key cheese"), also seen in Swedish spelling as Nökkelost and sometimes called kuminost (cumin cheese), is a Norwegiancheese flavored with cumin and cloves. But it is not flavored with caraway seeds, as many people think. It is semi-hard, yellow, and made from cow's milk. It is made in the shape of wheels or blocks. Nøkkelost cheese is a factory-made variation of Leyden cheese (Nøkkel means "key" - a reference to Leiden's coat of arms), and has been made since the 17th century. Its period of maturation is three months.
There was a version of Nøkkelost manufactured and marketed in the US throughout the 1960s.Kraft Foods first called it "Caraway" then later used "Kuminost Spiced Cheese" on the label. It disappeared in the late 1970s. This cheese is also produced by cheese makers Pleasant Valley Dairy  from Ferndale, WA and Three Village Cheese Co. in the Town of Newport, NY.