Ingredients
Method
Fill 1 old-fashioned glass with ice; set aside. Place sugar cube in another old-fashioned glass. Pour bitters, then water over sugar; muddle with back of spoon until sugar dissolves.
Add ice to fill glass, then add whiskey. Let stand, stirring often, about 5 minutes. Discard ice from first glass; add absinthe. Swirl to coat inside of glass, then pour out absinthe. Strain whiskey mixture into glass. Twist lemon peel above cocktail and run along lip of glass. Discard lemon.