Classic Old Fashioned Syrup

Citrus bite. Bitter warmth.

Proof Syrup started with a practical bar problem: how to make a true Old Fashioned quickly without stripping out the drink’s character. What began in that cocktail-bar kitchen became a hand-bottled line in 2014, still made in small batches with organic cane sugar, citrus oils, and classic bitters.

Made with organic cane sugar, real citrus oils, and aromatic bitters, this syrup folds the Old Fashioned’s signature flavors into a single pour, so adding an aged spirit is all that stands between bottle and cocktail. Orange and lemon come through first, followed by spice and a clean bitter edge that gives every glass the snap of a house Old Fashioned mixed with zero dithering.