Aviation

Garnish: maraschino cherry

Glassware: Chilled coupe

Shake all ingredients with crushed ice and double strain into a chilled coupe. Garnish with cherry.

a light blue cocktail in a honeycomb etched coupe glass with lemon peel garnish sitting on a wooden countertop
Chris Ruppel
Riffs: Where Art Thou
Source: The Savoy Cocktail Book, page 26.

AKA Bartender’s Handshake. The Savoy Cocktail Book omits creme de violette, but as The Educated Barfly notes, it's an original ingredient and has become the defining note of the cocktail for the faded blue color that it imparts.