Colleen Bawn
Dry shake for 10 seconds, then shake with ice for 15 seconds. Strain, and top with fresh grated nutmeg and/or cinnamon.
Upped the ingredients from 3/4 oz to 1 oz each, to better pair with the larger size of modern day eggs.
Resurrected by Murray Stinson (Zig Zag Cafe) and Paul Clarke
The Flowing Bowl, London, 1903
Kind of seems crazy to me that with 2 oz. of liqueurs this would need the simple.