This lovely libation, named for an Ernest Hemingway character who orders the very-similar Jack Rose cocktail, is the brainchild of New York bartender Natalie Jacob. It’s imperative that you use a real grenadine, made from pomegranate juice (not red corn syrup, as you often find in the US). The corn stuff will do alright, but it lends the drink a sappy cotton-candy flavor that takes away from the marvelous interplay of flavors and textures.
