Make a creamy Danube Delta fish soup with catfish, potatoes, root vegetables, dill, sour cream and tempered egg yolks.
Storceag (Danube Delta Catfish Soup)Storceag is a creamy fish soup associated with Romania’s Danube Delta. This practical home version uses catfish, potatoes and vegetables, finished with sour cream, egg yolks, lemon and dill.
Storceag is a fish soup associated with the Danube Delta and especially with Sfântu Gheorghe, a fishing village near the Black Sea. The name is often linked to a local word for a young sturgeon, and older accounts describe the soup with sturgeon. The dish has changed with the fish available to cooks: contemporary Delta references commonly mention catfish, while other versions use sturgeon or other firm white fish. This recipe uses farm-raised catfish and calls it a modern home adaptation, not a claim to reproduce one fixed village formula. A mild broth, potatoes and root vegetables make the base; sour cream and egg yolks give it a pale, lightly thickened finish, while lemon and fresh dill keep the flavor bright.
Romanian descriptions do not agree on every detail of storceag. Some accounts emphasize a clear fish soup enriched with sour cream and yolk; local narratives also mention whey as an older way to soften the broth. The selection of vegetables changes from kitchen to kitchen, and fish may be served in the bowl or in larger portions alongside the soup. The recipe below brings these strands into a practical pot for eight portions: catfish chunks poach in a vegetable broth, then a tempered sour-cream and egg mixture is stirred in gently. The method preserves the recognizable fish-soup character and explains where this household version makes choices among documented variations.
Catfish is a mild, firm fish that works well in a soup because the pieces hold together when poached gently. Ask the fishmonger for skinless fillets with pin bones removed, or check them carefully yourself before cutting. Keep the fish cold until the pot is ready for it and use a separate board or clean the board and knife thoroughly after handling it. The fish enters only after the vegetables and potatoes have softened, which keeps its cooking short and helps prevent the pieces from breaking apart. A thermometer gives a reliable safety check: the center of the thickest piece should reach 63 °C. Opaque flesh that separates easily is a useful second cue, but it does not replace measuring the temperature.
The vegetable base is deliberately gentle. Onion, carrot, celery and red pepper soften in a small amount of sunflower oil without browning, so their sweetness supports rather than dominates the fish. Water keeps the broth light; unsalted fish stock makes it fuller if you have it. Add salt in measured portions because the sour cream and lemon change how the broth tastes at the end. Potatoes simmer until tender but still intact. Cut them evenly and test one with a small knife: it should yield easily while its edges remain defined. A vigorous boil can break the vegetables and make the soup cloudy, so lower the heat as soon as the liquid boils.
The cream-and-yolk finish needs a little care. Cold dairy and egg yolks can curdle if they meet a pot of hot broth all at once. Whisk them together first, then add several ladles of hot soup gradually while whisking. This warms the mixture and narrows the temperature difference before it returns to the pot. Stir the soup over low heat until the egg mixture reaches 71 °C, then take it off the heat; do not boil it. This controlled step gives the broth a silky body without turning it into a thick sauce. Use pasteurized eggs for people who are at higher risk from foodborne illness, and keep the finished soup refrigerated promptly.
Lemon and dill go in at the end rather than during the long simmer. Lemon brightens the creamy broth, and dill adds a fresh herbal note associated with fish cookery around the Delta. Add the juice gradually and taste before adding the reserved salt. The result should be savory and gently tangy rather than sharply sour. Parsley brings a second, milder green flavor, but it should not obscure the dill. Let the soup stand for five minutes off the heat so the flavors settle, then serve it hot with fish, potato and vegetables in each bowl. A slice of bread is a simple accompaniment if desired; no garnish is needed to make the bowl complete.
Storceag is best eaten shortly after cooking, while the catfish is tender and the broth remains smooth. If you need to prepare parts ahead, dice the vegetables and refrigerate them covered, and keep the fish separate and chilled. Finish the soup close to serving time. Cream-based soup can thicken as it cools; when reheating, warm it gently over low heat and stir often so the dairy does not split. Divide leftovers into shallow containers and refrigerate them within two hours at or below 4 °C. Use within three to four days, and reheat thoroughly to 74 °C. Avoid repeatedly warming the full pot, because each cycle can soften the fish and potatoes further.
Because sturgeon populations are protected and wild sturgeon fishing is prohibited in Romania, this recipe does not direct readers to source wild fish. Sturgeon is part of the dish’s historical identity, and legally farm-raised sturgeon appears in modern recipes, but farmed supply in Romania remains limited. Catfish is also documented in present-day Delta versions and is the accessible fish chosen here. If a cook substitutes another firm white fish, the soup remains an adaptation; cooking time will vary with the size and species of the pieces, so use the temperature check rather than the clock alone. Storceag’s identity rests on its Delta context and fish-soup structure, not on pretending that every household uses the same ingredients.
Pat the catfish dry and cut it into even 3 cm chunks. Keep it chilled while you dice the onions, carrots, celery and red pepper, and cut the potatoes into 2 cm pieces. Wash your hands, knife and board after handling raw fish. Set a clean plate aside for the cooked soup.
Warm the sunflower oil in a heavy-bottomed soup pot over medium-low heat. Add the onions, carrots, celery and red pepper with 3 g of the measured salt. Cook for about 8 minutes, stirring often, until the onions turn translucent and the vegetables begin to soften. Keep the heat gentle so they do not brown.
Pour in the water or unsalted fish stock and add the remaining 6 g salt and black pepper. Bring just to a boil, then lower the heat and simmer for 10 minutes. Add the potatoes and simmer gently for 15 minutes, until a knife enters a piece easily but the edges remain intact.
Lower the catfish chunks into the soup and keep it at a gentle simmer for about 8–12 minutes, turning the pieces once with a ladle. Check a thick piece with a food thermometer; the center must reach 63 °C and the flesh should be opaque and separate easily. Turn off the heat once the fish is cooked.
Whisk the sour cream and egg yolks in a heatproof bowl until smooth. Slowly whisk in 3 ladles of hot broth, one at a time, to warm the mixture without scrambling the yolks. Stir the mixture back into the pot. Return it to low heat and stir constantly until the soup reaches 71 °C; do not let it boil.
Stir in the lemon juice, dill and parsley. Taste and adjust with the reserved salt or a little more lemon if needed. Let the soup stand off the heat for 5 minutes, then serve hot with the fish and vegetables in each bowl. Refrigerate leftovers in shallow containers within 2 hours.
Similar-size chunks poach at the same rate. Check each thick piece for pin bones before it goes into the pot.
A rolling boil can break the fish and potatoes. Lower the heat once the broth begins to boil.
Add hot broth a ladle at a time while whisking. The gradual warming helps keep the sour cream smooth.
Stir in the lemon gradually at the end and taste before adding more salt.
| Problem | What to do |
|---|---|
| The sour cream mixture looks grainy | The broth may have been too hot or boiled after the dairy was added. Whisk in a little warm broth off the heat; next time temper the yolk mixture with several ladles and heat only to 71 °C. |
| The fish breaks apart | The soup may be boiling too hard or the pieces may be overcooked. Keep it at a gentle simmer, turn the chunks only once and check temperature early. |
| The broth tastes flat | Add lemon juice in small amounts and taste again before adding the reserved salt. Fresh dill should be stirred in near the end. |
| Original ingredient | Practical substitute | What changes |
|---|---|---|
| Farm-raised catfish | Another firm, boneless white fish | Poaching time depends on species and thickness. Check that the center reaches 63 °C; the recipe is then a practical adaptation rather than a fixed storceag formula. |
| Water | Unsalted fish stock | Fish stock gives the broth a fuller flavor. Use unsalted stock so you can control the soup’s measured salt. |
Divide leftover soup into shallow containers and refrigerate within 2 hours.
Keep at or below 4 °C and use within 3–4 days.
Warm gently, stirring often, until the soup reaches 74 °C throughout.
Storceag is a fish soup associated with the Danube Delta, especially Sfântu Gheorghe. Traditional accounts center on sturgeon, while many contemporary local versions use catfish. This recipe is a catfish adaptation with vegetables, potatoes, sour cream, egg yolks and dill.
Use only traceable, legally farm-raised sturgeon; do not use wild-caught sturgeon. The fish may need a different poaching time, so check the thickest piece with a thermometer and cook it to 63 °C.
Whisk hot broth into the sour cream and yolks gradually before returning the mixture to the pot. Heat over low, stirring constantly, until it reaches 71 °C; do not boil.
Divide it into shallow containers and refrigerate within 2 hours at or below 4 °C. Use within 3–4 days and reheat thoroughly to 74 °C, stirring gently.
Explore more regional dishes and home recipes from Romania.
