[2] The cocktail was invented in the US in 1979 in Wilson's Saloon in Norwich, Connecticut by Charles Burke Cronin Oat.

[3] He had originally created a mixed shot drink called a Grandfather combining Baileys Irish Cream and Kahlúa.

[6][11] In 2014, The Junction nightclub in Oxford included the drink in promotional material for St. Patrick's Day.

[12][13][14] This drew complaints, followed by withdrawal of the promotion and a public apology by the bar manager.

The drink should be consumed quickly as the alcohol will cause the cream to curdle within a short time.