Polish Easter Soup (Żurek): Tangy Sausage and Egg Soup

Polish Easter soup, often called żurek, is a tangy rye-based soup served with sausage, potatoes, and hard-boiled eggs. Its sourdough starter gives a savory broth a bright, distinctive flavor, while the toppings make it a satisfying meal; recipes vary by region and family, and some households serve a related soup called white borscht.

Ingredients

8 cups (1.9 L) low-sodium chicken broth
1 pound (450 g) fresh Polish white sausage, such as biała kiełbasa
1 medium yellow onion, about 5 ounces (150 g), peeled and quartered
2 garlic cloves (about 6 g), lightly crushed
1 bay leaf
2 whole allspice berries
1 pound (450 g) waxy potatoes, peeled if desired and cut into ½-inch (1.25 cm) cubes
1 cup (240 ml) rye żur starter, stirred or shaken before measuring
½ cup (120 ml) sour cream
1 tablespoon (15 g) prepared horseradish, plus more to taste
1 teaspoon dried marjoram (about 1 g), rubbed between your fingers
½ teaspoon fine salt (about 3 g), plus more to taste
¼ teaspoon ground black pepper (about 0.5 g), plus more to taste
4 large eggs, for serving
2 tablespoons (6 g) chopped fresh dill or chives, for serving (optional)

Rye żur starter is a fermented mixture of rye flour and water sold in Polish or Eastern European groceries, sometimes labeled żurek soup starter. It supplies the soup’s characteristic sour rye flavor, so use it if you can find it. Bottled starter can settle: shake it well, then measure. If it is unavailable, see the variation below for a practical, less traditional tangy substitute. Fresh Polish white sausage is also sold as biała kiełbasa; ask for uncooked sausage, not a ready-to-eat smoked version.

Instructions

Start the eggs and prepare the soup base. Put the eggs in a small saucepan and cover with cold water by about 1 inch (2.5 cm). Bring to a boil, then cover the pan, take it off the heat, and let the eggs stand for 10 to 12 minutes. Meanwhile, pour the chicken broth into a large pot. Add the onion, garlic, bay leaf, and allspice, and bring the broth to a gentle simmer over medium heat. Starting the eggs now lets their cooking and cooling happen while the soup simmers.
Simmer the fresh sausage. Lower the fresh white sausage carefully into the simmering broth. Keep the liquid at a gentle simmer rather than a hard boil, which can split the casings. Cook the sausage for about 25 minutes, turning it once if it is not fully covered. Check the center of the thickest sausage with a food thermometer; fresh ground-pork sausage must reach the USDA FSIS safe minimum internal temperature of 160°F (71°C). Remove the cooked sausage to a plate. If it needs a few more minutes to reach temperature, keep simmering and check again.
Cook the potatoes. Add the potato cubes to the broth and simmer for 12 to 15 minutes, until a knife slides easily into a cube. The broth should bubble gently. While they cook, drain the eggs and transfer them to cold water for about 5 minutes, then peel them. Cook whole eggs until the yolk and white are firm; avoid leaving them in hot water for much longer than needed, or the yolks can develop a gray-green edge.
Add the rye starter and seasoning. Stir the żur starter well, then pour it into the pot gradually, stirring as you go. Add the marjoram, salt, and pepper. Bring the soup back to a gentle simmer and cook for 5 minutes so the starter’s raw flour taste mellows and its flavor blends into the broth. Do not boil it vigorously; a steady, low simmer is enough. Taste the broth before adding more salt, especially if the starter or broth is already seasoned.
Finish with cream and horseradish. Put the sour cream in a small bowl and whisk in a ladleful of hot soup, a little at a time. This warms the cream gradually and helps prevent it from curdling. Stir the warmed cream mixture into the pot along with the horseradish. Keep the soup on low heat for 1 to 2 minutes, without letting it boil. Taste and adjust the pepper, salt, horseradish, or marjoram.
Slice and serve. Cut the cooked sausage into thick coins and return it to the pot just long enough to warm through. Remove the bay leaf, onion, garlic, and allspice berries if you prefer a smoother bowl. Halve the peeled eggs. Ladle the soup into bowls with sausage and potatoes, then add an egg half and a sprinkle of dill or chives to each serving.

The timing assumes a pot of broth that comes to a simmer in about 5 minutes and average-size fresh sausages. If the sausages are especially thick, thermometer readings—not the clock—determine when they are ready. Keep the soup gently hot while you finish it; a rolling boil after adding sour cream can make the texture grainy.

Tips

Balance the sourness gradually. Starter strength varies, so stir it in and taste before adding extra. For a milder soup, begin with ¾ cup (180 ml) starter and add more in small amounts. If it becomes too sharp, a little more broth or sour cream softens the flavor without hiding it completely.
Temper the sour cream. Mixing a ladle of hot broth into the cream before adding it to the pot is a simple way to reduce curdling. Use full-fat sour cream for the most stable, rounded texture, and keep the soup below a boil once the cream is in.
Choose the sausage for the texture you want. Fresh white sausage gives the broth a gentle, savory flavor and a soft bite. If you cannot find it, fully cooked smoked kielbasa is a practical substitute; it will taste smokier and saltier. Since kielbasa is already cooked, slice it and warm it in the soup near the end rather than simmering it for the full sausage-cooking time.
Do not overcook the potatoes. Cut them into even cubes so they finish together, and check them at 12 minutes. If they cook until they fall apart, the soup can become starchy and muddy. Waxy potatoes generally hold their shape better than very floury varieties.

Serving Suggestions

Serve żurek hot as a main course, with a hard-boiled egg and several slices of sausage in every bowl. Rye bread is a natural accompaniment: its hearty crumb is useful for dipping, and its mild flavor works well beside the sour broth. A slice of crusty wheat bread is an easy alternative. For a more substantial Easter table, offer the soup as a first course before roast meat, salads, or other holiday dishes, and keep the portions modest.

Set out small bowls of extra horseradish, chopped dill or chives, and sour cream so everyone can adjust their own serving. A little horseradish adds a sharp, warm note; too much can overpower the rye tang, so add it a teaspoon at a time. The soup already includes potatoes and sausage, so a simple green salad or sliced cucumber is enough alongside it if you want a lighter contrast.

Variations

For a white-borscht-style bowl: In some Polish households, white borscht is closely related to żurek, but recipes differ in the souring liquid and seasonings. For an accessible version when rye starter is unavailable, whisk ¾ cup (180 ml) buttermilk with ¼ cup (60 ml) water and 1 tablespoon (15 ml) lemon juice, then stir it into the soup on low heat near the end. This makes the broth tangy and creamy but does not reproduce the fermented rye flavor of żur. Add it gradually and do not boil the soup.

Use smoked sausage: Fully cooked kielbasa can replace the fresh white sausage. Its smoke and seasoning will change the character of the broth, so start with less salt and taste before adding more. Add the sliced sausage near the end just to heat it through.

Make it meat-free: Leave out the sausage and use vegetable broth. Add 1 cup (150 g) sliced mushrooms, sautéed separately until browned, or offer them as a topping. The result is lighter and less savory than the sausage version; extra marjoram and horseradish can help build flavor, but the soup will not have the same meaty broth.

Adjust the toppings: Some cooks serve the potatoes in the soup, while others serve them separately; this recipe keeps them in the pot for convenience. You can also add a spoonful of cooked, diced bacon as a garnish, or leave the egg out if you prefer. Keep any additions restrained so the sour rye broth remains the central flavor.

Storage and Reheating

Refrigerate the soup within 2 hours of cooking, preferably in shallow airtight containers so it cools promptly. It keeps for 3 to 4 days in the refrigerator. For the best texture, store peeled eggs separately and add them to individual bowls; eggs left in the soup can become firm and rubbery as the soup is reheated. The potatoes may soften a little during storage, but the soup remains suitable to reheat within that time.

Reheat only the amount you plan to serve in a saucepan over medium-low heat, stirring often, until it is steaming throughout and reaches 165°F (74°C), the USDA FSIS safe temperature for reheated leftovers. Do not let the soup boil hard, particularly after the sour cream has been added. If it has thickened in the refrigerator, stir in a splash of broth or water as it warms. For microwave reheating, cover loosely, heat in short intervals, and stir between intervals so the soup heats evenly; check the temperature in more than one spot.

Freezing is possible, but cream-based soups can separate and potatoes can turn mealy after thawing. If you want to freeze a portion, freeze the soup before adding the sour cream, in a freezer-safe airtight container, and use it within about 2 months for better quality. Thaw it overnight in the refrigerator, reheat to 165°F (74°C), then temper and stir in fresh sour cream. Do not leave the soup at room temperature to preserve it.

Frequently Asked Questions

Is żurek the same as Polish white borscht?

They are related sour Polish soups, and the names are used differently across regions and households. Żurek is commonly associated with a fermented rye starter, while white borscht may use a different souring base, such as a wheat-based starter or dairy. There is no single recipe followed by every family, so the ingredients and names can overlap.

What does żur starter taste like?

It tastes pleasantly sour and slightly earthy, with a mild fermented rye character. The strength varies by product and how long it has fermented, which is why the recipe adds it gradually and asks you to taste before adding extra. It should make the broth tangy, not harsh or unpleasantly sharp.

Can I make the soup without a Polish grocery store?

Often, yes. Look online or in the international aisle for bottled żur or żurek starter; stir or shake it well before measuring. For sausage, fresh Italian-style pork sausage without fennel can stand in for white sausage, though it changes the seasoning. If no rye starter is available, the buttermilk-and-lemon variation makes a tangy soup, but it will not have the same fermented rye flavor.

Can I prepare Polish Easter soup ahead?

You can make the broth, sausage, and potatoes a day ahead and refrigerate them promptly. Reheat the soup gently, stir in the rye starter if you have kept it separate, and finish with tempered sour cream shortly before serving. Boil and peel the eggs ahead as well, but store them covered in the refrigerator and add them to bowls at serving time.

Why did my soup turn grainy or curdle?

The most common cause is boiling after sour cream has been added, or adding cold cream directly to very hot broth. Temper the cream with a ladle of hot soup first, stir it in over low heat, and avoid a rolling boil. If the soup is already slightly grainy, gentle stirring may improve it, but aggressive boiling is more likely to worsen the texture.

Can I use leftover cooked sausage?

Yes. Use fully cooked sausage, slice it, and add it near the end so it warms without becoming tough. If the sausage is leftover food, reheat it as part of the soup until the soup reaches 165°F (74°C). Reduce added salt if the sausage is smoked or heavily seasoned.

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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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