The company actually trademarked the drink so that only those made with their rum can legally be called a Dark 'n Stormy. Where there is still some room for debate is over which ginger beer is the correct one to use. For many, it has to be Barritts, a brand from Bermuda, but for others the Gosling’s brand ginger beer is the way to go. And of course, many of today's top bars opt to make their own in-house.
Expert mixologist Jim Meehan’s Black ‘n Stormy recipe uses one ounce of Noval BLACK Port, which, he says, mellows out the rum in this timeless cocktail, making it richer and smoother, adding more complexity and spice, and lending a sense of pitch-perfect balance.
But Gosling’s official Dark ‘n Stormy recipe is made with just two ingredients: 1½ ounces of Gosling's Black Seal Rum, and 4–5 ounces of Gosling's Stormy Ginger Beer.