1 oz blended aged rum1 oz pineapple rum¾ oz blended aged overproof rum1 oz pineapple juice¾ oz lime juice¾ oz cinnamon syrup1 dash Angostura bitters1 cup ice
instructions :

Combine all the ingredients in a blender with a scoop (1 cup) of crushed ice, and blend for 5 seconds.
Pour into a glass and garnish.

source :
Steven Liles, Smuggler’s Cove (San Francisco)