2 oz. (60 ml) Dark Rum
3/4 oz. (22.5 ml) freshly squeezed lime juice
1/2 oz. (15 ml) grenadine
1/2 to 1 egg white
2 dashes Peychaud's bitters
How it's done
Add all ingredients into a shaking tin and dry shake (without ice) for roughly 10 seconds.
Add ice to the shaking tin and shake for 10-20 seconds.
Double strain into an ice-filled lowball or a pre-cooled stemware glas.