Following Jason Clapham's advice, but I accidentally added 10ml of jalapeƱo-infused tequila to the original formula which adds a whole new dimension. Definitely 'beefed it up'!
Tried this with Malibu last night; it definitely works, although probably ended up sweeter, smoother on the tongue and less alcoholic than this recipe (which asks for 40% coconut rum and Malibu is 20%).
My nephew brought me a bottle back from Mexico, no idea what to do with it until I saw this recipe. A smokey, quite unique tasting cocktail, everyone I've made it for have really enjoyed it.