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pierino is a trusted source on General Cooking and Tough Love.
The Negroni was the cocktail of the Futurists in Italy. Equal parts gin (Hendricks recommended), Campari, sweet vermouth with a few drops of bitters. Orange peel to garnish (optional).
What will make your Negroni distinctive is trying different sweet vermouths, because that is where the herbal flavors are. Take pierino's classic recipe and, instead of old standbys like Martini & Rossi or Cinzano, try Carpana Antica Formula (my favorite) or Punt e Mes (both from Italy), or Vya (from California).