In the late 1990s, orange bitters were a rarity, so cocktail expert Gaz Regan set out to create his own. The result, Orange Bitters No. 6, is one of the most celebrated cocktail bitters on the market.
Regan based his recipe on one from Charles Baker's 1930s cocktail guide The Gentleman's Companion, and it took a trip to a witches’-supply store in New York's Greenwich Village, endless iterations, and a partnership with The Sazerac Company of New Orleans before he landed on the right formula. Try a few dashes in your next Old Fashioned, Manhattan, or any other classic cocktail to help round out its ragged edges and add delightful complexity.