
Dubonnet rouge is a sweet, red, wine-based aromatised aperitif of the quinquina type, bittered with herbs, spices, and a small amount of quinine.
Rounded and moderately full on the palate, finishing on a gentle quinine bitterness; sweet and herbal through the middle, carried by a red, wine-based body.
Bartenders stir it as a low-strength base or co-base, where its sweetness, colour, and quinine bitterness carry the drink, or add it in smaller measures as an aromatic, sweetening accent. Because bottled strength differs by market, the ~14.8% and ~19% versions are not interchangeable at the same measure without rebalancing.
Another quinquina-type aromatised wine is the honest swap, since the defining quinine/cinchona bitterness cannot be reconstructed from unrelated bittering agents; a drier stand-in can be sweetened with sugar syrup and the red colour approximated with another red aromatised wine, but the substitute must remain a low-strength, wine-based sweet aperitif rather than a spirit.
Vermouth
Vermouth is an aromatised wine whose defining bittering botanical is wormwood (Artemisia); a quinquina like Dubonnet is defined instead by cinchona bark / quinine. Both are fortified, aromatised, sweetened aperitif wines, so they are easily lumped together.
Americano / bitter aromatised wine (gentian and wormwood)
The quinquina bitterness comes from quinine (cinchona); an Americano-denomination aromatised wine derives its bitterness from wormwood plus gentian rather than quinine. These are legally distinct products under the bitter aromatised wine category.
A quinquina is an aromatised wine traditionally flavoured with cinchona bark (Cinchona spp.), the botanical source of quinine that gives the style its characteristic bitterness. Fermentation is arrested by the addition of alcohol, fortifying the base wine; bottled strength varies by market, with the French version around 14.8% ABV and the US version around 19% ABV.
As a wine-based product it oxidises once opened; refrigerate after opening and use within a few weeks.
The style belongs to the French quinquina tradition; Dubonnet itself was created in 1846 by Parisian chemist Joseph Dubonnet, who infused fortified wine with quinine partly to make bitter antimalarial quinine more palatable.