A perfect Manhattan with bittersweet liqueur rather than aromatic bitters and a balancing dash of sweet maraschino liqueur.
If you can't obtain Picon...
My favourite Manhattan-style recipe. I make with Bigallet China-China in place of the Picon, which I prefer. Also add a drop or two of the syrup from the Maraschino jar.
Thanks Alex. Bigallet China-China is a great tip. after experimentation, I've added a note above, but instead of maraschino, I found triple sec added the missing orange notes while water tames the higher alc./vol..