Step 1.
- Chill an Old Fashioned glass by filling it with ice and setting aside.
Step 2.
- In a mixing glass, combine the bourbon and simple syrup.
Step 3.
- Add several dashes of aromatic bitters to the mixing glass.
Step 4.
- Fill the mixing glass with ice and stir until well chilled.
Step 5.
- Discard the ice from the chilled Old Fashioned glass.
Step 6.
- Strain the mixture into the prepared glass over one large ice cube.
Step 7.
- Add a few drops of absinthe to the glass and swirl to coat the inside.
Step 8.
- Garnish with a twist of orange peel, expressing the oils over the cocktail.