A perfect Manhattan with bittersweet liqueur rather than aromatic bitters and a balancing dash of sweet maraschino liqueur.
If you can't obtain Picon...
I love this drink…just made me a nightcap….and I do have a bottle of Amer Picon that I keep refrigerated but “all truth told” , ordered it from Belgium during the pandemic….seems to still be wonderful?? I used my staple, Bulliet Rye…and both Martini and Rossi vermouths..