In a shaker half-filled with ice cubes, combine the light rum, dark rum, anisette, lemon juice, and grenadine.
Shake well.
Strain into an old-fashioned glass almost filled with ice cubes.
Top with the cola.
Stir well.

Old-fashioned glass

  • 1 oz Light rum
  • 1 oz Dark rum
  • 1 tsp Anisette
  • 1/2 oz Lemon juice
  • 1/2 tsp Grenadine
  • 1 oz Coca-Cola