The Dark Side cocktail is a delicious and well-balanced drink that offers a fruity and slightly sweet taste with hints of rum and blackberry liqueur. It's a perfect choice for those who love fruity cocktails with a bit of a kick. The fresh lime juice and simple syrup balance out the flavors, while the angostura bitters add a hint of spice. This cocktail is easy to make and is sure to impress your guests. Garnish with blackberries and a lime wedge for an added touch of elegance.