Created in Hong Kong in the early 1980s, generally attributed to a chef at Spring Moon restaurant in The Peninsula Hotel. The luxury ingredients reflect Hong Kong's Cantonese fine-dining culture of the period.
XO sauce is a Hong Kong creation of the 1980s — a luxury condiment born in the Cantonese fine-dining explosion of that decade, named after XO (Extra Old) cognac not because it contains cognac but because cognac was the symbol of luxury among Hong Kong's new wealthy class. It is a cooked paste of premium dried seafood — dried scallops (conpoy), dried shrimp, and Jinhua ham — combined with chillies, garlic, shallots, and oil, making it one of the most umami-intense condiments ever created. The dried scallops are the centrepiece: rehydrated in water overnight, then shredded and fried in oil until golden and crisp. They contribute an almost impossibly deep sea-sweetness and a texture that adds crunch to the paste. Dried shrimp bring additional seafood umami; Jinhua ham (or its Spanish equivalent, jamón) contributes the cured meat savouriness that makes XO sauce work even with non-seafood dishes. The chillies, garlic, and shallots are fried separately until golden, then combined with the seafood components. The technique is careful frying rather than a quick paste-assembly — each component is cooked separately to its optimal state before combination. The dried scallops must be fried until crisp or they will be chewy; the shallots must be golden without burning; the garlic must be blonde, not raw. The combination is then gently simmered in oil until everything is integrated and the oil has absorbed the combined flavour of every ingredient. XO sauce is used as a condiment (spooned over noodles, rice, dumplings), as a stir-fry paste (a tablespoon in the wok before adding any protein creates an extraordinary flavour base), and as an umami intensifier in cooked sauces. Even a small amount transforms a dish.
Intensely savoury, oceanic, and complex — a luxury umami bomb of dried seafood and cured meat in aromatic oil
Dried scallops (conpoy) are non-negotiable for the authentic version — they provide the unique deep-sea sweetness Fry each component separately to its optimal state before combining — rushed single-pan preparation loses texture Fry until the oil is deeply flavoured and the seafood components are golden and slightly crisp The oil itself becomes a condiment — the flavoured oil is as valuable as the solids A small amount goes a very long way — it is concentrated umami
A tablespoon of XO sauce in fried rice transforms it from simple to extraordinary — toss in at the very end For a vegetarian approximation: dried shiitake mushrooms and dried tomatoes replace the seafood components XO sauce keeps refrigerated for months under oil — replenish the oil surface after each use Steamed tofu with XO sauce and crispy shallots is one of the simplest great Cantonese preparations XO sauce heated with butter (equal parts) makes a pasta sauce of shocking depth — serves 4 from a tablespoon
Using cheap or sub-standard dried scallops — the quality of the scallop is the quality of the sauce Frying all components together at once — they have different cooking times; separate frying is essential Skimping on the oil — XO sauce is preserved in oil; insufficient oil causes it to dry out Over-chillying — the heat should be present but the sauce is about umami, not heat Not allowing enough cooking time — each component needs proper caramelisation