Cream Liqueur, quite simply is a liqueur that has dairy cream added to a liquor. The most famous examples come from Ireland; they have a base of Irish whiskey; there are also version from Scotland, Canada, the US and several other countries.
Most of these cream liqueurs are in the 14% to 17% alcoholic range and are medium-sweet with flavors such as nougat, praline and chocolate. Most are served over the rocks. The category took off in the 1970s and although not as wildly popular today, it has remained strong.