While I am not Italian and I have not yet visited The Boot, but it’s my understanding that Sambuca is the thing to add to your coffee or espresso. Sambuca is an herbal liqueur that’s available in either the white or black versions, and will run you upwards of $30 a bottle.
Romana is really the most familiar Sambuca brand, with the towering Colosseum on the label. The white variety is incrementally higher in alcohol than the black, but the flavor is pretty similar in both: black licorice. White seems a bit sharper and more licoricey than the black, and black tastes a tad more syrupy, but the flavor is hard to tell apart unless you’re doing it side-by-side, and really, you may just want to choose the color based on the cocktail you’re making. For instance, I’ll be making Black Martinis for Halloween (stay tuned for the recipe), so black is the one I need.
The premise of this liqueur is pretty simple: add a shot of Sambuca in the place of sugar in your coffee or espresso of choice, much like you would with Bailey’s. It adds some sweetness and flavor, and as long as you don’t dislike anise flavoring, Sambuca may be a fun addition to your coffee.