Tried it with ferro china baliva instead of Campari.
So obviously this did give a brown colour to the cocktail.
Rather have the iron negroni cocktail or standard negroni.
Not convinced about the sour element added to this.

Really nice and boozy. The whiskey bitters make a difference. I resisted buying some because of the price it is very much worth it.

It is a really nice liqueur with outstanding pear aroma. A little sweet (for my liking) to taste on its own. Adding a small ice cube does the treat. I offered it to friends and they loved it.

I have used the Avallen calvados which has this gorgeous apple flavour and reduced the amount of Antica Formula to 20ml. Partner felt it was well balanced this way. Served cocktail in Nick & Nora.