Yield: serves 1, multiply as needed
Add ice to mixing glass. Pour in dark rum, Grand Marnier, blackberry syrup, lime juice, and pineapple juice. Stir until mixture is cold. Strain cocktail into a serving glass with a big ice cube. Garnish with fresh mint, blackberries, and a slice of lime.
To make blackberry syrup: Place fresh blackberries, sugar, and water in a small sauce pot. Set over medium heat and bring to a boil. Remove from heat. Use a muddler or fork to break up the blackberries. Allow mixture to cool before straining. Keep in an airtight container and store in the fridge for up to 2 weeks.
All images and text ©The Little Epicurean