Duo jiao yu tou (剁椒鱼头, literally chopped chilli fish head) is one of the most dramatic and beloved preparations of Hunan cuisine — a large silver carp head (yong ke yu, 镛客鱼, or bighead carp) split open and face-up, blanketed entirely with a vivid red paste of fermented chopped chillis (duo jiao, 剁椒), garlic, and ginger, then steamed for 15-20 minutes until the fish is just cooked. Finished at the table with a drizzle of hot oil poured over the chilli paste to release the final aromatic bloom. The fish head's collagen-rich cheeks and gelatinous skin absorb the fermented chilli paste flavour completely, and the soft texture of the fish against the bold, sour-spicy fermented chilli is the defining Hunan flavour experience.
The duo jiao (fermented chopped chilli): Available ready-made in jars (commonly sold as duo jiao in Chinese grocery stores — the most famous brand is from Changsha). Making duo jiao: Fresh red chillis (ideally the thin-skinned Hunan variety), washed, dried, and roughly chopped with garlic and salt, then packed into sealed jars and fermented at room temperature for 1-2 weeks. The fish: Use a large carp head (about 700g-1kg). Ask the fishmonger to split it in half lengthwise. The split fish head should be placed open-side up on a heatproof plate. Preparation: Season the fish head with Shaoxing wine, salt, and white pepper. Cover generously with duo jiao paste — spread it across every exposed surface. Scatter with finely sliced ginger and garlic. Steaming: Place the plate in a steamer over rapidly boiling water. Steam 15-18 minutes for a 700g head; 20-25 minutes for a 1kg head. The fish should be fully cooked — the flesh should flake at the thickest point. The finish: Remove from steamer. Scatter with sliced scallion across the surface. Heat 3-4 tbsp of neutral oil until smoking. Pour the hot oil over the scallion and chilli paste — the sizzle is the signal that the dish is ready to eat.
Using a thin fish rather than a carp: The collagen-rich, gelatinous texture of carp head is essential. A lean white fish will cook too quickly and dry out. Insufficient duo jiao: The chilli paste should be generously applied — a thin layer does not provide enough flavour.
Fuchsia Dunlop, Every Grain of Rice (2012)