For a classic mix of Caribbean flavours, you really can’t go past a Corn ‘n’ Oil. The “oil” in the Corn ‘n’ Oil is a reference to blackstrap rum, which sits atop this cocktail like a puddle of petroleum.
Although historically this is stirred, if you shake the first three ingredients, it allows air to get into the cocktail and helps incorporate and brighten the citrus. Strain into a Collins glass, then add crushed ice.
Float the black strap and bitters over the top of the drink. Stir to combine before drinking.