Sazerac

Rinse a chilled Old Fashioned glass with the absinthe, ensuring it coats the interior.

Add crushed ice to the glass and set it aside for chilling.

In a mixing glass, stir the rye whiskey, simple syrup, and Peychaud's bitters over ice until well chilled.

Discard the ice and any excess absinthe from the Old Fashioned glass.

Strain the mixed drink into the prepared glass.

Garnish with a twist of lemon zest, expressing its oils over the surface of the cocktail.