In a cocktail shaker, combine the pisco, lemon juice, maple syrup, and egg white, adding the egg last. At this point, you can either do a dry shake (shake the cocktail vigorously without ice for 30 to 40 seconds, then add ice and shake a second time to chill it), or you can add ice to the shaker from the get-go and shake vigorously for 30 to 40 seconds.
Either way, strain into a chilled coupe, and garnish with five drops of Angostura bitters -- drag through them with a toothpick if you feel like being fancy.
Brandon and Molly met because of a mutual interest in food - or, more specifically, when Brandon read Molly's food blog Orangette and sent her an e-mail that included some very effective compliments. The better part of a decade later, they co-own and run the restaurant Delancey and its sibling Essex, in Seattle. Brandon is the chef of both, and when he's not manning the wood-burning oven, he likes to make things from scratch that more sane people would probably buy, like mustard, vinegars, pretzels, and obscurely flavored liqueurs. Molly is the manager / Organizer of All Things at Delancey and Essex, and she is also the author of the New York Times bestseller A Homemade Life and the forthcoming memoir Delancey. They have a young daughter named June, who is excitedly crawling toward the refrigerator as Molly types this sentence, and two dogs named Jack and Alice.