To be a real Dark N’ Stormy you’d have to use Gibsons Rum and Ginger beer. I recommend picking up a “funkier” rum like Kraken Spiced Rum.
2 oz Dark Rum
3 1/3 oz Ginger Beer
Couple dashes of bitters
Chill a rocks glass or a double rocks glass
Put salt on a small plate (or a lid to a deli container works great)
Take a lime wedge and cut a slit into the flesh, halfway to the rind
Put the rim of the glass in the slit and run the lime along the whole length
Turn glass upside down on the salt plate (lid) to coat the top of the glass
Combine tequila, Cointreau, lime juice and agave nectar into shaker filled with ice.
Shake for 30 seconds.
Serve in chilled salted glass with the lime wedge on the rim.