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Three snifter glasses of bright red, blue and amber liqueur side by side against a pale wall.

Spirit Academy › Liqueur Aperitivo › Liqueurs, Amari, Vermouth and Bitters

Liqueurs, Amari, Vermouth and Bitters

Sweetened, flavored spirits and their bitter cousins: what the law says a liqueur is, and how amaro, vermouth, bitters and RTDs fit around it.

Level 1 · Start here4 min readUpdated October 2026 Liqueur aperitivo shelf

In one sip

A liqueur is a spirit that has been flavored and sweetened: fruit, herbs, nuts, coffee, cream or peel, with enough sugar that the law treats it as its own class. Around that core sit the bitter relatives (amaro and aperitivo), the wine-based ones (vermouth and other aromatised wines), the cocktail seasonings (bitters) and the newest arrival, the ready-to-drink can.

Where it started

Many of the oldest names on this shelf began as apothecary or monastery recipes and only later became pleasures. Chartreuse traces its formula to a manuscript given to the Carthusians in 1605;8 Bénédictine dates its revival to 1863;9 Angostura's founder first produced his aromatic bitters in 1824.10 Turin turned wormwood wine into a commercial product in 1786, when Antonio Benedetto Carpano created the first commercial brand of vermouth.11 Absinthe bans between 1898 and 1932 pushed drinkers toward other aperitifs, and vermouth benefited.11 Campari, Aperol, Fernet-Branca and the other classic Italian bitters each have their own story on the pages below.

Where and how it's made

United States

Federal rules define cordials and liqueurs as flavored distilled spirits made by mixing or redistilling spirits with or over fruits, flowers, plants or their juices, or with extracts of them, and containing sugar of not less than 2.5 percent by weight.1 The label may say "Cordial" or "Liqueur", or a type name such as Amaretto, Triple Sec, Sambuca or Crème de (flavor).1 A liqueur may never be called "straight", and may add the word "dry" only if sugar is under 10 percent by weight.1 Spirits that fit no standard become "distilled spirits specialty products", which may carry a fanciful name, such as the name of a cocktail, next to a statement of composition.2

European Union

Liqueur needs at least 15 percent alcohol and at least 100 grams of sweetening per litre, with lower floors of 70 grams for some cherry liqueurs and 80 grams for liqueurs flavored only with gentian or wormwood.4 "Crème de" raises the floor to 250 grams per litre, and crème de cassis to more than 400.4

Vermouth is not a liqueur at all: under U.S. rules it is a type of aperitif wine, compounded from grape wine and bottled at not less than 15 percent alcohol.3 In the EU an aromatised wine must be at least 75 percent wine by volume.5

Cocktail bitters often sit in a separate federal category: "nonbeverage products" made with taxpaid spirits that are unfit for use for beverage purposes.6

In the U.S. market, cordials were a $2.7 billion category in 2025, while premixed cocktails including spirits RTDs reached $3.8 billion.7

How to taste it

Pour a small measure into a small tulip or a rocks glass. Sweet liqueurs show more when slightly chilled; bitter ones open up with ice and a splash of soda. Taste for the balance between sugar, bitterness and alcohol rather than for any single flavor. Pairings: an orange liqueur with dark chocolate, an amaro after a rich pasta, a dry vermouth with salted almonds and olives.

Styles and what the label means

AmaroItalian bittersweet herbal liqueurs, from gentle to fernet.Open →Aperitivo bittersred and orange bitter liqueurs built for before dinner.Open →Herbal liqueursmonastery-recipe and secret-recipe herbal liqueurs, green, yellow and dark.Open →Orange liqueurstriple sec, curaçao, cognac-based orange.Open →Coffee and cream liqueurscoffee, chocolate, Irish cream.Open →Fruit and nut liqueurscassis, maraschino, amaretto, nocino.Open →Anise spiritssambuca, ouzo, pastis, arak.Open →Absinthewormwood, anise and fennel, served with water.Open →Vermouth and aromatised winesweet, dry, bianco, quinquina.Open →Cocktail bittersaromatic, Creole and orange bitters by the dash.Open →Ready-to-drink cocktailsspirits-, malt- and wine-based cans.Open →

Words to know

Tap a term to get asked about it in The Tasting Room.

CordialCrème deMacerationAromatised wineAmaroSpecialty product
Cordial — the U.S. synonym for liqueur on a label.
Crème de — a liqueur named for its main flavor, crème de menthe for mint. In the EU its raw materials must exclude milk products.
Maceration — steeping fruit, herbs or peel in spirit to pull out flavor.
Aromatised wine — wine flavored with botanicals, the family vermouth belongs to.
Amaro — Italian for bitter; the name for herbal bitter liqueurs.
Specialty product — the U.S. catch-all class for spirits that fit no other standard of identity.

Sources

  1. 27 CFR 5.150 Cordials and liqueurs (eCFR) accessed 2026-10-12
  2. 27 CFR 5.156 Distilled spirits specialty products (eCFR) accessed 2026-10-12
  3. 27 CFR 4.21 The standards of identity (wine) (eCFR) accessed 2026-10-12
  4. Regulation (EU) 2019/787, Annex I, as adopted (legislation.gov.uk archive of EU text) accessed 2026-10-12
  5. Regulation (EU) No 251/2014, Article 3, as adopted accessed 2026-10-12
  6. 27 CFR 17.11 Meaning of terms (eCFR) accessed 2026-10-12
  7. DISCUS Annual Economic Briefing 2025 (Feb 5, 2026) accessed 2026-10-12
  8. Difford's Guide — Chartreuse Verte (Green Chartreuse) accessed 2026-10-12
  9. Bénédictine — Heritage accessed 2026-10-12
  10. Angostura Bitters — Our Story accessed 2026-10-12
  11. Difford's Guide — History of vermouth accessed 2026-10-12

Photo: Jonathan Rubio, CC BY 2.0, via Wikimedia Commons

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