The Ancient Mariner

• crushed ice
• 1 ounces Demerara Rum (not the 151-proof kind)
• 1 ounce dark Jamaican rum, such as Coruba
• 3/4 ounce fresh lime juice
• 1/2 ounce fresh grapefruit juice
• 1/2 ounce simple syrup
• 1/4 ounce Allspice Dram

lime wedge, mint sprig

Fill a double old fashioned glass with crushed ice, then add both rums, lime, grapefruit juice, simple syrup, and allspice dram. Stir gently, then garnish with a lime wedge and mint sprig.