Bleu des Causses (Occitan: Blau dels Causses) is a French blue cheese made from whole cow's milk. Some consider it as a mild variant of Roquefort. The cheese has a fat content of 45% and is aged for 3–6 months in Gorges du Tarn's natural limestone caves. The ripening process involving naturally temperature-controlled cellars is the major element that gives it its special aroma. Today, it is a relatively rare cheese that is only made by a handful of small producers.