Angostura bitters is a concentrated herbal mixture that adds flavor and complexity to cocktails and other beverages. Originating in the early 19th century in Venezuela, it was created by a doctor named Johann Gottlieb Benjamin Siegert as a medicinal tonic. Today, it is best known for its use in classic cocktails like the Old Fashioned and the Manhattan. The bitters are made from a blend of herbs, spices, and other botanicals, giving them a unique taste that balances sweetness and bitterness. Just a few dashes can transform a drink, making Angostura bitters a staple in bars and home cocktail kits around the world.