Dried scallop, known as conpoy in Cantonese cooking, is the preserved adductor muscle of a scallop that has been boiled in salted water and then slowly dried over several days. The result is a small, amber-colored disc with an intensely concentrated umami flavor, prized across East and Southeast Asian cuisines as a seasoning ingredient. Think of it as a flavor bomb: a single piece can transform a pot of rice porridge, a broth, or a stir-fried vegetable dish.
How Dried Scallops Are Made
The process starts with fresh, live scallops. Workers open the shells and carefully remove everything except the adductor muscle, the firm, cylindrical piece of meat that holds the two shells together. The gills, skirt, gonads, and organs are all discarded. This is an important detail for both flavor and safety, since the organs tend to accumulate more contaminants than the muscle itself.
The cleaned muscles are then cooked in salted water for about eight minutes, drained, and cooled. From there, the scallops are dried until their moisture content drops to roughly 19 to 20 percent. Traditional sun drying takes about 96 hours: the scallops are spread on gauze, covered with another layer to keep out insects and dust, and left to dry in open air. Modern producers also use hot air drying, freeze drying, or cold air drying, each of which produces slightly different flavor and texture profiles. The traditional natural drying method is generally considered to yield the deepest, most complex flavor.
Why the Flavor Is So Intense
Dried scallops are one of the most concentrated natural sources of umami, the savory “fifth taste” that makes foods like aged cheese, soy sauce, and mushrooms so satisfying. The flavor comes from specific compounds in the scallop muscle. Glutamic acid and aspartic acid, two amino acids, are the primary drivers. These work alongside flavor-boosting nucleotides that amplify the umami sensation well beyond what either compound would produce alone. It’s a synergy effect: the amino acids and nucleotides together create a taste that’s far more intense than the sum of their parts.
Drying concentrates all of these compounds by removing water, which is why a single dried scallop delivers a punch of flavor that a fresh scallop simply can’t match. The drying process also generates new aromatic compounds through slow chemical reactions between sugars and amino acids, adding layers of toasty, caramel-like depth.
Nutrition at a Glance
Dried scallops are extremely protein-dense. A 100-gram serving of cooked scallop meat contains about 24 grams of protein, along with meaningful amounts of selenium, magnesium, and zinc. Because the scallops are boiled in salted water before drying, they’re also high in sodium: around 660 milligrams per 100 grams of cooked scallop, and that concentration increases further in the dried form. In practice, though, most recipes use only one to five dried scallops at a time, so actual sodium intake per serving stays relatively modest.
How to Use Dried Scallops
Dried scallops are too hard to eat straight out of the package. They need to be rehydrated before cooking, typically by soaking in water for one to two hours, or overnight in the refrigerator for the best results. The soaking liquid itself is packed with flavor and should never be discarded. It becomes a ready-made stock.
Once softened, the scallops can be shredded into fine strands by hand or left whole depending on the dish. Common uses include:
- Congee (rice porridge): one or two scallops simmered with the rice create a deeply savory base
- Soups and broths: added whole during a long simmer to build a rich, layered stock
- Stir-fried vegetables: shredded and tossed with greens like Chinese broccoli or winter melon
- XO sauce: a luxury condiment from Hong Kong built around dried scallops, dried shrimp, chili, and garlic oil
- Steamed dishes: placed on top of tofu, eggs, or dumplings as a finishing flavor
A little goes a long way. Recipes that call for dried scallop typically use just a few pieces to season an entire dish for a family.
Grading, Size, and Price
Dried scallops vary enormously in quality and price. The key factors are size, color, and the species of scallop used. Larger scallops from colder, deeper waters generally command higher prices. High-quality dried scallops are a deep golden amber with a smooth surface and a clean, sweet ocean smell. Dull, grayish, or powdery scallops are considered lower grade.
At Asian grocery stores and specialty markets, you’ll typically see them sold in clear bags or jars, sometimes graded by the number of pieces per catty (a traditional unit of about 600 grams). Fewer pieces per catty means larger scallops and a higher price. In the United States, 2024 wholesale prices ranged from about $26 per kilogram for smaller bay scallop varieties to over $60 per kilogram for larger sea scallop varieties. Retail prices at specialty stores can run significantly higher, and premium Japanese or Chinese varieties sometimes sell for well over $100 per kilogram.
Safety and Storage
Because drying concentrates everything in the scallop tissue, including any heavy metals the animal absorbed during its life, food safety authorities have tested dried scallops for contaminants like cadmium, lead, arsenic, and mercury. The reassuring finding: since dried scallops are made exclusively from the adductor muscle (with the organs removed), contaminant levels are consistently low. Testing by Hong Kong’s Centre for Food Safety over a five-year period found all 31 dried scallop samples tested satisfactory for heavy metals.
Store dried scallops in an airtight container in a cool, dry place. Refrigeration extends their shelf life to a year or more. In humid environments, they can develop mold if left exposed, so sealed storage matters. Well-kept dried scallops actually improve slightly with age, much like a fine dried ingredient should, as their flavors continue to deepen over time.