Ardrahan is an Irish pasteurized cow's milk semi-soft cheese with a washed rind. The texture and flavor is creamy and nutty while slightly buttery. It originated in the 1980s on the Burns family farm in Duhallow, County Cork.
This cheese is typically sold in specialty cheese shops. If you don't have a good cheese shop in your area then you can purchase it online at iGourmet.com.
If you don't have Ardrahan cheese then here are the best substitutes: