Mortlach used to be predominantly used for blends. However recent years have shown some excellent sherry matured Mortlachs, like this one.
Mortlach 1990, 20 year old cask 4412. 700ml, 56,5%
Mortlach has traditionally always been producing spirit that goes into blends. But as a single malt Mortlach can be great. Especially when sherry matured around the 20 year mark it is a must try!