What makes it authentic
Must-SeeReal limoncello uses Sorrento or Amalfi lemons (IGP), grain alcohol, sugar, and water — nothing else. Check the label: "Limoncello di Sorrento IGP" is the gold standard.
Best producers
Must-SeeLimoncello di Capri, Villa Massa, and Piemme are established producers. Small family producers at the Saturday market in Sorrento are often better and cheaper.
What to avoid
Must-SeeCheap limoncello in novelty bottles (leaning towers, etc.) is industrial — made with lemon flavouring, not real lemons. If the bottle is more interesting than the content, walk away.
How to taste
Must-SeeGood limoncello is smooth, not syrupy. It should taste of lemon zest, not lemon candy. Serve ice-cold from the freezer in small glasses. It should make you close your eyes and see the Amalfi Coast.
Bottom line
Ask to see production, taste before buying, and check for DOP/IGP certification. Authentic Italian products are worth the effort to find.