Dark Horse

25 ml rum
25 ml Kahlua coffee liqueur
5 ml rosso vermouth
1 dash lemons
Coca-Cola

Pour the rum, Kahlua, vermouth and lemon into a cocktail shaker half-filled with ice cubes. Shake and strain into a Champagne flute over crushed ice. Top with Coca-cola. Garnish with a lemon slice, and serve.