This is a drink made popular in London by Townhouse and Lab Bar. The vanilla liqueur required for this drink has been hard to find in California.
Recently, San Francisco bartender and man-about-town Dominic Venegas gave me a sample of the re-re-introduced Navan Vanilla Liqueur.
Navan is cognac-based, and maintains a sturdy 40% by volume. The Navan has a natural vanilla aroma, and a strong vanilla flavor. It's a great match for this cocktail.
This cocktail works best if you make the vanilla sugar it requires, so I've included a recipe for that below.
A London Vanilla Daquiri
1 1/2 oz Bacardi 8-year old rum
1 teaspoon vanilla sugar
1/3 oz lime juice
2/3 oz Navan Vanilla Liqueur
Combine all ingredients and shake hard over ice. Fine strain into a cocktail glass. Garnish with a lime wheel.
2 pounds granulated sugar
3 vanilla pods
Blend in food processor.
Sift out larger pieces of vanilla
The original calls for Bacardi 8, but I think there is plenty of room for experimentation in your rum choices. I'd like to try it with an ounce of light rum and an ounce of demerara rum. If you've got some ideas, let me know in the comments.