XO Sauce: Hong Kong's Luxury Seafood Condiment

XO sauce is a spicy, savory condiment built from dried seafood, most notably dried scallops (conpoy) and dried shrimp, cooked down with chili peppers, garlic, and oil. It is a modern invention of Cantonese cuisine, not a historic or regional folk sauce.

XO sauce originated in Hong Kong in the 1980s, most commonly credited to the Peninsula Hotel's Spring Moon restaurant in Tsim Sha Tsui, where it began as a complimentary table condiment before diners asked to buy it by the bottle. The name references XO ("extra old") cognac, a prestige liquor popular among Hong Kong's wealthy diners at the time; the sauce itself contains no cognac, but the name signals the expense of its seafood ingredients.

Beyond dried scallops and shrimp, recipes commonly include dried or cured fish, ham, shallots, and dried chili. The seafood is soaked, shredded, and slow-cooked in oil with the aromatics until deeply savory and slightly sweet, with a chunky texture closer to a relish than a smooth sauce.

In Cantonese and broader Chinese cuisine, XO sauce is used as a finishing condiment rather than a base for cooking: stirred into fried rice or noodles, tossed with stir-fried vegetables, or spooned over steamed tofu and seafood. Commercial bottled versions vary widely in quality and seafood content, and many Hong Kong restaurants and home cooks still make their own proprietary batches.

Because of its expensive dried-seafood base, XO sauce is treated as a premium condiment rather than an everyday staple, and only small amounts are typically used to season a dish rather than as a primary ingredient.