Straight from the gorgeous islands of Bermuda, the Dark and Stormy is named this way for good reason. The drink is a brand-specific, potent-yet-simple combination of Gosling's Black Seal rum and Barrit's ginger beer. Depending on your preference, you can add a dash of lime. Do not try to substitute any of the ingredients; stay away from ginger ale beer and white rum. You don't want to end up with a Light and Stormy.
1/4 ounce of lime
2 ounces Gosling's Black Seal dark rum
10 ounces Barrit's ginger beer
Lime wedge for garnish if desired
Add the ingredients to a 12-ounce highball glass with ice. Squeeze a lime wedge over the ice (optional). Pour the beer and the rum in the glass. Stir well and add another lime wedge as garnish.