1½ oz column still aged rum¾ oz blended aged demerara rum1 oz Don's Gardenia mix½ oz orange juice½ oz lime juice1 tsp falernum1 dash Angostura bitters
instructions :

Put everything into a blender with 4 oz (½ cup) of crushed ice and blend at high speed for 10 seconds.

Double straining into a Pearl Diver glass filled with crushed ice, pressing on solids to squeeze out all liquid into glass.

Add more ice to fill.

Don’s Gardenia mix :

  • 1 oz softened unsalted butter (or browned butter)
  • 1 oz honey
  • 1 tsp cinnamon-infused sugar syrup
  • ½ tsp vanilla syrup
  • ½ tsp pimento liqueur
  • 1 pinch of salt

Weigh 60 g solid butter for 1 fl. oz melted.

Keep it at room temperature, not in the fridge !

source :
Beachbum Berry’s Sippin' Safari, created by Don the Beachcomber's (1950s)