The Blue Moon is a classic cocktail that until recently has been near impossible to re-create, given the disappearance from the market of Creme Yvette. With the re-introduction of this classic liqueur, it can be enjoyed once again.
Shake and strain into cocktail glass. Garnish with lemon twist.
Using Creme Yvette results in a cocktail that is more reddish-purple; for a bluer cocktail, use Creme de Violette.