The secrets behind the perfect Irish Coffee

100 bottles of Irish whiskey and 2,000 Irish Coffees?

That’s a normal day’s yield at San Francisco’s time-honored Buena Vista Cafe. Batched along the bar in a neat line of 28 glass goblets, the cafe pours more Irish whiskey than anyone in the world thanks to its renowned recipe.

Invented by Irishman Joseph Sheridan in 1942, the original Irish Coffee was developed to soothe and revive the spirit. The recipe made its debut at the Buena Vista in 1952, when owner Jack Koeppler and international travel writer Stanton Delaplane set out to recreate the warming brew after Delaplane enjoyed a glass at Ireland’s Shannon Airport. Decades later, that same recipe graces the bar each day by the thousands.