Based on the Queen's Park Swizzle, from the Queen's Park Hotel, Trinidad, circa 1940s.

Ingredients

• 1
  oz
  of Lime juice
• 3
  barspoon
  of Demerara / dark Muscovado / brown sugar
• 1
  dash
  of Angostura Aromatic Bitters
• 6
  piece(s)
  of Mint leaves
• 3
  oz
  of Demerara Rum

Steps

• Dissolve sugar in lime juice, then swizzle everything in double old-fashioned glass partially filled with crushed ice.
• Add more crushed ice to fill.
• Swizzle again until glass frosts.
• Garnish with mint sprig and lime shell.