A classic cocktail that had long been forgotten, the Aviation's original recipe was published in Hugo Ensslin's book Recipe for Mixed Drinks in 1916.  Unfortunately, the use of Crème Yvette had vanished along with the liquor until very recently, thanks to the Cooper Spirits Company.    

Preparation

Combine all ingredients except for the garnish into a cocktail shaker with ice and shake for about 10 seconds. Strain into a martini glass and garnish with a lemon twist.