Wikipedia
Atholl Brose (or Athol Brose, Athole Brose) is a Scottish drink obtained by mixing oatmeal brose, honey, whisky, and sometimes cream (particularly on festive occasions). When made with cream the drink is rather like Baileys Irish Cream. Atholl Brose has also become an alternative name for the dessert Cranachan, which uses similar ingredients.
According to legend, the drink is named after the 1st Earl of Atholl, who quashed a Highland rebellion in 1475 by filling the rebel leader's well with the mixture, making him easily captured.
Atholl Brose has long been a part of the Hogmanay (New Year's) celebrations of the Seaforth Highlanders of Canada, where it is served in the Officers'- and the Warrant-Officers and Serjeant's Messes early on New Years' Day. This, as so many of their customs, traditions and dress, was inherited from the 2nd Battalion Seaforth Highlanders, the old 78th Ross-Shire Buffs.