Created in San Juan, Puerto Rico, in the 1950s, this is a longstanding classic. While it can be made with a variety of rums—dark, aged, spiced, white, coconut—I like using a combination, but feel free to use whatever rums you like.
Combine all the ingredients in a blender. Blend on High until smooth.
Pour contents into a tiki glass or tall glass.
Garnish with the pineapple wedge.
NOTES: Freezing the ingredients first means you can use less ice, leading to a more flavorful, less diluted drink.