No, it’s not made by fusing two atoms of boron with two of carbon. This formula was—no kidding—created by American intelligence officers during the waning days of World War II in order to make most efficient use of the stocks of looted French luxury goods they liberated from the retreating Germans. It’s a doozy. The name comes from the four ingredients. The ice is a modern innovation. A word to the wise: this drink is built to military specifications and has few safety devices built in.

1 ounce brandy (use a VSOP cognac)
1 ounce Bénédictine
1 ounce Cointreau
To finish: 2 to 3 ounces chilled brut champagne

Stir and strain into a chilled cocktail glass; top off with champagne.