Despite having such a simple formula — it's a sour made using aromatic bitters as the base spirit — the Angostura Sour is a much more modern creation than you might expect, though it does enjoy something of a rich historical lineage. Joining us to explore that drink today is KJ Williams, a veteran bartender who these days works at New York's Long Island Bar. Listen on (or read below) to learn KJ's Angostura Sour recipe — and don't forget to like, review, and subscribe!