Polish National Soup (Żurek) Recipe

Żurek, often described as Poland’s national soup, is a tangy rye-soured broth usually served with sausage, potatoes and a hard-cooked egg. Its distinctive flavor comes from fermented rye starter, while a little sour cream rounds out the broth; Polish regions and families make it in different ways.

Ingredients

8 cups (1.9 L) low-sodium chicken broth, or water for a lighter, more traditional-tasting base
1 pound (450 g) raw fresh Polish white sausage, also called biała kiełbasa; use pork sausage
2 bay leaves
4 whole allspice berries
1 medium yellow onion, about 1 cup chopped (150 g)
2 garlic cloves, finely chopped (about 6 g)
1 tablespoon (15 ml) neutral oil
1 pound (450 g) waxy potatoes, peeled and cut into ½-inch (1.25 cm) cubes
1 cup (240 ml) fermented rye żurek starter, shaken before measuring
1 tablespoon (8 g) all-purpose flour
½ cup (120 ml) sour cream, preferably full-fat
1 teaspoon (1 g) dried marjoram, rubbed between your fingers
½ teaspoon (1 g) freshly ground black pepper
½ teaspoon (3 g) fine salt to start, plus more to taste
4 large eggs (about 200 g in their shells)
1 tablespoon (15 g) prepared horseradish, optional
2 tablespoons (8 g) chopped fresh dill or parsley, for serving

Instructions

Prepare the ingredients. Chop the onion and garlic, peel and cube the potatoes, and shake the rye starter well. Its flour and fermented liquid can separate in the bottle, so mixing it first helps the soup sour evenly. Set out the sour cream and flour for later. If the eggs are cold, you can bring them to the boil in a separate saucepan while the soup begins cooking.
Simmer the sausage and seasonings. Put the broth, raw white sausage, bay leaves and allspice in a large pot. Bring it just to a boil over medium-high heat, then reduce the heat so the liquid simmers gently. Cook for about 20 minutes, turning the sausage once if it is not fully submerged. Avoid a hard boil, which can split the sausage casing and make the broth cloudy.
Cook the eggs while the broth simmers. Lower the eggs carefully into a saucepan of boiling water and cook for 10–12 minutes, until both yolk and white are firm. Transfer them to cold water, cool until easy to handle, then peel and halve. This can happen at the same time as the sausage simmers, so it does not add to the overall cooking time.
Check the sausage and start the potatoes. Check the thickest sausage with a food thermometer; the USDA FSIS safe minimum for ground pork sausage is 160°F (71°C). Lift the sausage onto a plate once it reaches that temperature. Add the cubed potatoes to the broth and simmer for 15–18 minutes, until they are tender when pierced with a knife but not falling apart. Remove the bay leaves and allspice berries if you can find them.
Soften the aromatics. While the potatoes cook, warm the oil in a small skillet over medium heat. Add the onion and cook for 5–7 minutes, stirring now and then, until soft and lightly golden. Add the garlic and cook for 30 seconds, just until fragrant. Stir the onion mixture into the pot. If you do not want to use another pan, you can cook the onion and garlic in the soup pot first, transfer them to a bowl, and then continue with the broth; allow a little extra time for that method.
Thicken and sour the soup. Whisk the flour into the sour cream until smooth. Whisk in a ladleful of hot broth, a little at a time, to warm the mixture gradually and reduce the chance of curdling. Stir the rye starter, marjoram, pepper and salt into the soup. Pour in the sour-cream mixture while stirring, then keep the soup at a gentle simmer for 5 minutes. Do not let it boil vigorously after adding the sour cream.
Finish and serve. Slice the cooked sausage into bite-size pieces and return it to the pot. Stir in the horseradish, if using, and taste the broth. Add more salt, pepper or starter as needed; rye starters vary in sourness and saltiness. Ladle into bowls and top each serving with a halved egg and chopped dill or parsley.

Tips

Choose the right starter. Look for fermented rye starter labeled żurek or zakwas żytni in a Polish or Eastern European grocery store. It is a pourable, sour mixture, not dry rye flour. If it is unavailable, bottled żurek soup concentrate is a practical substitute; follow its label for strength and add it gradually because some versions are saltier or more intensely sour. Plain vinegar or lemon juice will make the soup sharp but will not reproduce the mellow fermented rye flavor.
Keep the simmer gentle. A rolling boil can break up potatoes, split sausage and make the dairy grainy. Once the soup is assembled, look for small bubbles at the edges rather than vigorous bubbling through the whole pot.
Adjust sourness in stages. Starter brands and homemade batches differ. Begin with 1 cup (240 ml), taste after the soup simmers, and add more a tablespoon at a time if you want a sharper broth. If you add extra starter, simmer for a few minutes so its raw flour taste cooks out.
Make the dairy smooth. Whisk hot broth into the sour cream mixture gradually instead of adding cold cream straight to the pot. Full-fat sour cream is less likely to split, and the flour helps stabilize and lightly thicken the soup.

Serving Suggestions

Serve żurek hot as a filling first course or as the main meal, with a halved egg and slices of sausage in every bowl. Rye bread is a natural partner: use it to mop up the sour broth, or serve a slice alongside each portion. A small dish of extra horseradish lets everyone adjust the heat at the table, while chopped dill or parsley gives the rich, pale soup a fresh finish.

For a traditional Easter-style presentation, serve the soup with the egg and white sausage as the central garnishes. If you are serving it as part of a larger meal, keep the portions modest and pair it with a crisp cucumber salad or simply dressed greens. The soup is satisfying on its own, so sides with strong seasoning are unnecessary.

Variations

Use smoked sausage. Smoked kielbasa is an easy-to-find alternative to fresh white sausage. Because it is already cooked and has a smoky, savory flavor, slice it and add it during the final 5–10 minutes rather than simmering it for the full sausage-cooking period. The result will be smokier and less delicate. If you use raw sausage, follow the cooking and thermometer directions above.

Make it without meat. Replace the chicken broth with vegetable broth or water and leave out the sausage. Add sliced mushrooms, cooked white beans, or both for a heartier bowl. The flavor will not be the same as sausage-based żurek, but the sour rye starter, marjoram and egg still give it a characteristic Polish-style profile. If you include eggs, cook them until the yolk and white are firm.

Choose a lighter or richer finish. For a thinner broth, omit the flour and stir in the sour cream as directed, taking care not to boil the soup. For a fuller finish, keep the flour and sour cream and add a little extra marjoram. Some cooks add grated horseradish; others prefer to offer it at the table. These are normal variations rather than rules that define one single version.

Swap the potatoes. For a more pronounced rye-and-sausage soup, leave out the potatoes and serve with extra bread. Alternatively, cook the potatoes separately and add them to bowls so they remain intact in leftovers. The first option makes a thinner soup; the second keeps the broth from becoming cloudy as the potatoes soften during storage.

Storage and Reheating

Refrigerate leftover soup within 2 hours of cooking in a covered, shallow container. It keeps for 3–4 days in the refrigerator. For the best texture, store the peeled eggs separately and add them to bowls when serving; they are also fine refrigerated in their shells for up to a week if they were handled and cooled safely. The potatoes may soften and the broth may thicken overnight, which is normal.

Reheat only the amount you plan to eat in a saucepan over medium-low heat, stirring occasionally until steaming throughout. Leftovers should reach 165°F (74°C); check with a food thermometer, especially in a thick portion. Do not let the soup boil hard, as the sour cream may separate. Add a splash of broth or water if it has thickened, and adjust seasoning after reheating. Freeze the soup for up to 2 months in a freezer-safe container, leaving room for expansion. Thaw it in the refrigerator; dairy and potatoes can change texture after freezing, so stir well while reheating.

Frequently Asked Questions

What is Polish national soup?
Żurek is often referred to as Poland’s national soup, though there is no single official recipe and Polish cooking includes many beloved soups. Its defining feature is a sour rye starter, usually combined with broth, sausage and often potatoes and egg. Barszcz, a beet soup, is another well-known Polish soup.

Can I make żurek without fermented rye starter?
The fermented rye starter gives żurek its signature flavor, so there is no exact quick replacement. Bottled żurek concentrate is the closest convenient option. In a pinch, a little vinegar can add acidity, but it will taste sharper and lack the fermented rye aroma; use it sparingly and do not treat it as a like-for-like substitute.

Why did my sour cream curdle?
The soup may have been boiling too vigorously, or cold sour cream may have gone straight into very hot broth. Whisking flour into the cream and tempering it with hot broth helps prevent curdling. If it separates slightly, take the pot off the heat and whisk gently; the taste is usually still fine, though the texture may be less smooth.

Can I prepare this soup ahead?
Yes. Make the soup through the seasoning stage, cool it promptly and refrigerate it, then reheat gently and add the sausage and egg portions when serving. The sourness may seem stronger after a night in the refrigerator, so taste before adding more starter or salt. Keep the egg separately for the neatest presentation.

Is żurek supposed to be very sour?
It should taste pleasantly tangy, but the intensity varies with the starter and local or family preference. Start with the quantity in this recipe, taste after simmering, and add more in small amounts if you want a more assertive sourness. A little sour cream balances the rye’s acidity without hiding it.

Can I use cooked or smoked sausage instead of fresh white sausage?
Yes. Smoked kielbasa is a convenient substitute, but it brings a stronger smoky flavor and needs only a short time in the soup to heat through. Add it near the end rather than simmering it with the broth from the start. Fresh raw white sausage gives a milder flavor and should reach 160°F (71°C) before serving.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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