2 oz. Gin - (more) 1 Egg Yolk - (more) 1 tsp. Maraschino Liqueur - (more) 1/2 oz. Lemon Juice - (more) dash(es) Orange Bitters - (more)
In a shaker half-filled with ice cubes, combine all of the ingredients. Shake well. Strain into a sour glass.