Polish White Easter Soup (Bialy Barszcz) for Easter

Polish white Easter soup, or bialy barszcz, is a tangy soup made with fermented wheat starter, white sausage, potatoes, horseradish, and hard-boiled eggs. It is served warm, often as part of an Easter meal, and its creamy broth balances the starter’s gentle sourness with savory sausage and sharp horseradish. Recipes vary by region and family; this version uses wheat sour starter, while rye-based żurek is a close, more distinctly rye-flavored relative.

Ingredients

1 lb (450 g) fresh raw Polish white sausage (biała kiełbasa), preferably pork
8 cups (1.9 L) low-sodium chicken stock, or water for a lighter broth
1½ cups (360 ml) fermented wheat sour starter for bialy barszcz, stirred before measuring
1 lb (450 g) waxy potatoes, peeled and cut into ½-inch (1.25 cm) cubes
1 medium carrot, about 3 oz (85 g), peeled and cut into small dice
1 small yellow onion, about 4 oz (115 g), peeled and halved
2 garlic cloves, about 6 g, finely chopped or crushed
2 bay leaves
4 whole allspice berries
1 tsp (1 g) dried marjoram, lightly crushed between your fingers
2 tbsp (30 g) prepared horseradish, plus more at the table if desired
½ cup (120 ml) sour cream, at room temperature
6 large eggs, for boiling and serving
1 tsp (6 g) fine salt to start, plus more to taste
¼ tsp (0.5 g) freshly ground black pepper
2 tbsp (8 g) chopped fresh dill, for serving (optional)
1 tsp (5 ml) neutral oil or butter, only if needed to soften the onion (optional)

Instructions

Prepare the ingredients. Peel and cube the potatoes, dice the carrot, chop the garlic, and measure the starter, horseradish, and seasonings. Keep the sour cream out of the refrigerator so it can lose some of its chill before you add it. This preparation takes about 20 minutes, depending on how quickly you work.
Boil the eggs. Put the eggs in a small saucepan and cover them with cold water by about 1 inch (2.5 cm). Bring to a boil, then lower the heat to maintain a steady simmer for 10–12 minutes. For whole boiled eggs, cook until the yolk and white are firm. Transfer the eggs to cold water, cool, then peel and halve them. You can do this while the soup simmers.
Simmer the sausage and aromatics. Add the stock, onion halves, bay leaves, allspice, and sausage to a large pot. Bring to a gentle simmer over medium heat, which usually takes about 5 minutes, then cook gently for 18–20 minutes. Avoid a rolling boil, which can split the sausage casing. Check the thickest sausage with a food thermometer: USDA FSIS gives ground pork a safe minimum internal temperature of 160°F (71°C); if using poultry sausage, cook it to 165°F (74°C). Remove the cooked sausage to a plate. Discard the onion, bay leaves, and allspice once they have flavored the broth.
Cook the vegetables. Add the potatoes and carrot to the simmering broth. Cook uncovered for 12–15 minutes, until the potatoes are tender when pierced with a knife but still hold their shape. Keep the heat moderate and stir once or twice so nothing sticks to the bottom. If the liquid reduces more than you like, add a little hot water or stock.
Add the sour starter and seasonings. Slice the sausage into bite-size rounds and return it to the pot. Stir the wheat sour starter well, then pour it in gradually while stirring. Add the garlic, marjoram, horseradish, salt, and pepper. Warm the soup gently for 3–5 minutes, stirring often. Do not boil it hard after adding the starter; a gentle heat keeps the broth smooth and lets you adjust the sourness before it becomes too sharp.
Finish with sour cream. Put the sour cream in a bowl and whisk in a ladleful of hot broth a little at a time. This tempering step raises its temperature gradually and helps prevent curdling. Stir the warmed cream mixture into the soup and heat just until steaming. Taste and add more salt, pepper, or horseradish as needed. If you prefer a more pronounced tang, add another spoonful or two of starter, warming the soup gently after each addition.
Serve. Ladle the soup into bowls and add a halved egg to each serving. Sprinkle with dill if using. Serve while hot, with extra horseradish and bread at the table.

Tips

Choose the right sour starter. Polish shops and some European groceries sell bottled or refrigerated zakwas pszenny, fermented wheat starter intended for white borscht. Shake or stir it before measuring because flour can settle. If you cannot find it, use bottled rye żurek starter; the soup will still be satisfying, but its color may be darker and its flavor more earthy and rye-forward. Do not replace it with plain vinegar or lemon juice: those add sharpness but not the fermented grain flavor or body.
Keep the broth at a gentle simmer. A hard boil can split fresh sausage and make the soup look cloudy. Once the potatoes are tender, lower the heat before adding the starter and cream. If the soup gets hotter than intended, take it off the burner briefly and stir until the bubbling stops.
Adjust sourness in small additions. Starters differ in strength, age, and saltiness, so the full 1½ cups is a starting point rather than a reason to skip tasting. Add extra starter a few tablespoons at a time. If the result tastes too sharp, add a splash of stock or a little more tempered sour cream rather than trying to cover the acidity with a large amount of salt.
Use an easy sausage substitute if needed. If fresh Polish white sausage is unavailable, use fresh mild pork sausage without fennel, or a fully cooked Polish-style sausage. Fresh sausage needs the thermometer check in the method; fully cooked sausage only needs to be heated through. Smoked sausage gives the broth a noticeably smokier flavor, so choose it only if that is the taste you want.

Serving Suggestions

Serve bialy barszcz in warm bowls with an egg half and several sausage slices in each portion, making sure everyone gets some of the potatoes and carrot as well. A small extra spoonful of horseradish is a useful option for guests who like more heat, while chopped dill adds a fresh herbal note. Put the remaining eggs on a serving plate so people can take more if they wish.

For a fuller Easter spread, pair the soup with rye or sourdough bread, butter, and a simple plate of cold meats, pickles, or crisp radishes. The bread is practical for soaking up the sour broth, but it need not be elaborate. If the soup is one course among several, serve modest bowls; if it is the main dish, offer bread and a salad of tender greens alongside it. Set out salt, pepper, and horseradish separately so diners can season their own bowls.

Variations

Use rye starter for żurek-style soup. Replace the wheat starter with the same amount of fermented rye starter. The change makes the soup darker, more robust, and distinctly rye-sour. The names bialy barszcz and żurek are sometimes used loosely, but many cooks distinguish wheat-based white borscht from rye-based żurek; family and regional traditions differ.

Make it without meat. Leave out the sausage and use vegetable stock. For savory texture, add sliced mushrooms or a drained can of white beans during the last 10 minutes of cooking. This changes the traditional sausage-led flavor, so taste carefully and consider adding a little extra marjoram or horseradish. Keep the eggs for a meat-free but not vegan version, or omit them and use a suitable plant-based cream for a fully plant-based adaptation.

Change the richness or vegetables. For a lighter broth, use water or a mix of water and stock and reduce the sour cream to ¼ cup (60 ml). Celery root, cut into small cubes, can replace some of the potato; it brings a more earthy, aromatic flavor and a slightly less starchy texture. Avoid adding too many vegetables at once, since they can crowd the pot and dilute the characteristic tang.

Make the horseradish adjustable. Add only 1 tablespoon (15 g) to the pot and pass the rest at the table if you are serving people with different preferences. Prepared horseradish varies in strength and may contain vinegar, so it can add both heat and acidity. Freshly grated horseradish has a brighter, sharper bite; use it sparingly and taste as you go.

Storage and Reheating

Refrigerate the soup within 2 hours of cooking in shallow, covered containers. It keeps for 3–4 days in the refrigerator. For the best texture, store the peeled boiled eggs separately and add them to bowls when serving; otherwise, they can take on the soup’s flavor and become less pleasant in texture. If the broth thickens as it chills, that is normal as the potatoes and starter settle.

Reheat only the amount you plan to eat in a saucepan over medium-low heat, stirring often, until it reaches 165°F (74°C) throughout. Use a food thermometer to check the soup, and do not let it boil vigorously after reheating because the cream may separate. Add a splash of stock or water if it is too thick, then taste and adjust the seasoning. Microwave individual portions in a covered, microwave-safe bowl, stirring halfway through and checking that the center also reaches 165°F (74°C).

The soup can be frozen for about 2–3 months, although potatoes may soften and the sour-cream broth may separate slightly after thawing. For a better texture, freeze the broth and sausage before adding the sour cream, then thaw overnight in the refrigerator, reheat to 165°F (74°C), and stir in freshly tempered sour cream. Freeze peeled eggs separately only if necessary; their whites can become rubbery, so freshly boiled eggs are preferable.

Frequently Asked Questions

Is Polish white Easter soup the same as żurek? They are closely related sour soups, and the names are not used identically in every household. A common distinction is that bialy barszcz uses fermented wheat starter, while żurek uses rye starter. Both may include white sausage, eggs, and horseradish, but the grain starter gives each a different flavor and color.

Where can I buy wheat sour starter? Look for zakwas pszenny or a starter labeled for Polish white borscht at Polish or other Eastern European groceries, especially in the refrigerated section. Some shops carry shelf-stable bottles. If only rye starter is available, use it in the same amount and expect a more pronounced rye taste. Check the label before adding salt, since some starters are already seasoned.

Can I make the soup ahead? Yes. Cook the soup through the vegetable and starter steps, cool it promptly, and refrigerate it within 2 hours. For the freshest finish, keep the boiled eggs separate and add the sour cream after reheating, tempering it with hot broth first. Reheat the soup to 165°F (74°C), then serve with the eggs and dill.

Why did my sour cream curdle? Sour cream is more likely to curdle if it is added cold to very hot soup or if the pot boils afterward. Let it warm toward room temperature, whisk hot broth into it gradually, and stir the mixture back into the pot over gentle heat. If it has already separated, the soup is generally still usable, though the texture may be grainier; avoid boiling it further.

Can I use cooked or smoked sausage? Yes. Fresh raw white sausage gives the broth the most traditional mild pork flavor, but a fully cooked Polish-style sausage is a practical substitute. Slice cooked sausage and add it near the end just long enough to heat through. Smoked sausage brings a stronger smoky note and can make the broth taste saltier, so taste before adding the full amount of salt.

How do I make the soup less sour? Start with less starter, then add more after tasting; you can always increase the tang, but it is difficult to remove it. If the soup is already too sour, dilute it with a little stock or water and add a modest amount of tempered sour cream. Avoid adding baking soda, which can flatten the flavor and make the broth taste odd.

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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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