Italian Bitters

Combine the ingredients in a mortar and grind to a coarse powder and then pack in a percolator, or other suitable maceration vessel. Pass the alcohol through the percolator over a period of 48 hours to create the Italian Bitters essence. If macerating, allow the mixture to macerate for 2 days with occasional agitation, then filter and reserve the liquid.

To make the bitters, take 1 ounce of the bitter essence and add it to 4 pints of 40% alcohol.

To make the Italian Aromatic Bitters liqueur from the above essence, take 1 oz of essence and combine it with 1700 ml of 25% alcohol, 300 ml of 60% simple syrup.

by Darcy O'Neil :: [Bitters]

This recipe create an Italian style aromatic bitters. The source of this recipe groups aromatic bitters with things like Benedictine and Chartreuse. Cocktail type bitters would be called "Strong Bitters".