Crucian Carp with Agastache

Crucian Carp with Agastache has no single documented inventor — it evolved as a folk staple across Sichuan, especially along the southern reaches of the province (川南), where fresh agastache (土藿香, Agastache rugosa) grows prolifically along roadsides and in home gardens throughout summer. The herb is botanically distinct from the medicinal guanghuoxiang used in southern China; Sichuan's variety belongs to a different genus and carries an anise-herbal fragrance rather than a patchouli one. Its culinary and medicinal use is documented in the classical pharmacopoeia Ben Cao Gang Mu, which describes agastache as aromatic, warming, and beneficial for the spleen and stomach. By 2019, the dish had accumulated enough cultural standing that a formal Intangible Cultural Heritage nomination was launched in Chengdu — with Chengdu chef Yue Yong cited as the living skills bearer — following similar successful nominations for Twice-Cooked Pork and Water-Boiled Beef.

Flaky, sweet-fleshed crucian carp sits in a shallow pool of brick-red sauce. The sauce comes first — tangy from pickled chili and vinegar, salty-umami from doubanjiang, a breath of sugar rounding the edges. Then agastache arrives: a cool herbal note between anise and fresh tarragon, the smell of a Sichuan midsummer field. It builds on the palate and lingers after the heat has gone. Pour the sauce over white rice; the fish alone is worth working through every fine bone.

Agastache does two things in this dish: it deodorizes and it aromatizes. The leaves are rich in volatile compounds including methylchavicol and anethole, which on heating disperse into the braising liquid and mask the earthy off-notes of freshwater fish — primarily geosmin, a metabolite of algae and soil bacteria accumulated in the fish's flesh. Pan-frying the whole fish first creates a Maillard-browned crust that seals moisture and adds a savory baseline the braise builds on. Doubanjiang and pickled chili deliver both salt and lactic acidity from their fermentation; the acid gently tenderizes the fish's surface and helps flavors penetrate. Agastache is added in two waves: early, to steep into the braising liquid and release heat-stable deep aromas; and raw at the finish, to capture the more volatile fresh notes that evaporate first under heat.