
Orange bitters is a concentrated cocktail bitters flavored with orange peel — often bitter Seville orange — over a base of spices like cardamom, coriander and caraway.
Used as a seasoning, not a base: a dash or two wakes up a spirit-forward drink with citrus lift and light bitterness. It’s the second bottle after Angostura in most bars, and the one that makes a dry Martini or an Old Fashioned read brighter without adding sweetness.
Another brand of orange bitters swaps dash for dash, though the flavor differs by brand. Without any, twist a strip of orange peel over the drink: it gives the orange aroma, though not the bitterness. Angostura or another aromatic bitters, dash for dash, keeps the bitterness but adds warm spice instead of citrus and tints a clear drink. You can also leave it out; the drink will just taste plainer.
Aromatic bitters (e.g. Angostura)
Gentian bitters flavored mainly with spices.
Regans’ No. 6 and Fee Brothers West Indian Orange
Two widely sold bottles that taste different: Regans’ is sharply bitter with a strong cardamom note, while Fee Brothers’ is softer and slightly sweet.
This is the bitters that does not keep indefinitely, because the working part is citrus oil and citrus oil oxidizes. A year-old bottle still seasons a drink; it seasons it with something duller and slightly resinous. Buy the small bottle unless the bar goes through orange bitters quickly.
Martinez (gin version)
London dry gin