2 ounces bourbon (a rye-heavy bourbon such as Bulleit, Buffalo Trace or Basil Hayden is recommended)
1/2 ounce coffee liqueur
2 dashes orange bitters
Garnish: wide strip of orange zest
Combine bourbon, coffee liqueur, and orange bitters in a mixing glass and fill with ice. Stir well until chilled, about 30 seconds. Strain into chilled cocktail glass.
Twist orange peel to express oils over drink and use as garnish (or, for a better floor show and a deeper flavor, flame the orange twist and then use the twist as garnish.)