Serra da Estrela is a semi-soft cheese made from the milk of Bordaleira Serra da Estrela and Churra Mondegueira breeds of sheep. Milking is done by hand, after which the milk is heated, salted, and curdled using thistle extract.
The curd is formed into cheeses, which are left to ripen in humid and cold conditions. The cheese has a creamy, semi-soft interior that is yellowish-white in color, while its flavor is clean, sweet, and slightly sour. This cheese is Portugal's oldest, most traditional food product with international acclaim.
In the 13th century, the king of Portugal opened the first cheese market in Celorico da Beira, in the Serra da Estrela mountain range, where the cheese is still produced today. This cheese was even present on some of the first ships to sail to the New World.