Speed Rack co-founder Lynnette Marrero makes this tropical riff on the Seelbach cocktail by subbing in dark rum for the traditional bourbon.
Slideshow: More Rum Drinks
In a cocktail shaker, combine the dark rum with the Cointreau and bitters. Add ice and shake well. Strain into a chilled flute and top with the Champagne. Garnish with an orange twist.