Polish Yellow Split Pea Soup with Sauerkraut

This Polish-inspired yellow split pea soup combines tender dried peas, potatoes, vegetables, and tangy sauerkraut in a hearty, gently seasoned broth. Recipes vary by region and household: sauerkraut is a bright, savory addition to this version, stirred in after the peas soften so its acidity does not slow their cooking.

Ingredients

1 1/2 cups (300 g) dried yellow split peas, picked over and rinsed
1 tablespoon (15 ml) neutral oil, such as canola oil
1 medium yellow onion, about 1 cup (150 g), finely diced
2 medium carrots, about 1 cup (130 g), diced
2 celery ribs, about 3/4 cup (90 g), diced
2 garlic cloves (6 g), finely chopped
6 cups (1.4 L) low-sodium vegetable broth or water
1 medium russet or Yukon Gold potato, about 1 cup (150 g), peeled if desired and cut into 1/2-inch (1.25 cm) cubes
1 bay leaf
1 teaspoon (1 g) dried marjoram
1/2 teaspoon (1 g) freshly ground black pepper, plus more to taste
1 1/2 cups (225 g) sauerkraut, drained lightly and roughly chopped if the strands are long
1/2 teaspoon (3 g) fine salt to start, plus more to taste; use less if your broth or sauerkraut is salty
1 tablespoon (15 ml) sauerkraut brine or cider vinegar, optional, for adjusting the finish
2 tablespoons (8 g) chopped fresh dill or parsley, optional, for serving

Instructions

Rinse and prepare the ingredients. Sort through the split peas and discard any small stones or shriveled peas, then rinse them in a fine-mesh sieve under cool running water. Dice the onion, carrots, celery, and potato, and chop the garlic. Drain the sauerkraut lightly; do not rinse it, since its brine contributes the soup’s characteristic tart, fermented flavor. If the sauerkraut is in long ribbons, cut them into shorter pieces so they are easy to eat from a spoon.
Soften the vegetables. Warm the oil in a large, heavy pot or Dutch oven over medium heat. Add the onion, carrots, and celery with the starting 1/2 teaspoon of salt. Cook for about 8 minutes, stirring now and then, until the onion is translucent and the vegetables have begun to soften. Keep the heat moderate: browning is not necessary, and scorched onion can make the broth taste bitter. Stir in the garlic and cook for 30 seconds, just until fragrant.
Simmer the split peas. Add the rinsed peas, broth or water, bay leaf, marjoram, and black pepper. Stir and bring the pot to a boil, then reduce the heat to maintain a gentle simmer. Partly cover the pot, leaving a small gap for steam to escape, and cook for 55 minutes, stirring every 15 minutes or so and scraping the bottom. If the soup bubbles vigorously, lower the heat. The liquid should move gently rather than boil hard. The peas will be partly broken down but may not yet be completely tender.
Add the potato. Stir in the potato cubes and continue simmering for 15 minutes, partly covered. Stir occasionally, especially near the bottom of the pot. Check a few peas and a piece of potato: the peas should crush easily against the side of the pot, and the potato should be tender when pierced with a fork. If the peas are still firm, give them another 5 to 10 minutes before adding the sauerkraut. Split peas vary in age, so tenderness is a better guide than the clock.
Finish with sauerkraut. Stir in the sauerkraut and simmer gently for 10 minutes. Taste a spoonful after a few minutes; the soup should have a noticeable but balanced tang. Remove the bay leaf. If the soup is thicker than you like, add hot water or broth a little at a time. If it tastes flat, add a teaspoon of sauerkraut brine or cider vinegar, then taste again. Adjust salt and pepper at the end, since both broth and sauerkraut can contain plenty of salt.
Rest briefly and serve. Turn off the heat and let the soup stand for 5 minutes so the texture settles. It will thicken as it sits, and the split peas may continue to soften. Stir well, ladle into bowls, and finish with chopped dill or parsley if using. For a thinner soup, loosen individual servings with a splash of hot broth or water.

Tips

Skip soaking, but rinse and sort. Yellow split peas do not need an overnight soak for this recipe. Rinsing removes loose dust, and sorting is worthwhile because a small stone can occasionally be mixed in with dried pulses. If your peas are old and remain firm after an hour, keep simmering them in the broth until tender before proceeding.
Add the sauerkraut after the peas soften. Acidic ingredients can slow the softening of dried legumes. Waiting until the peas are tender helps the soup cook more predictably and keeps the sauerkraut’s fresh, tangy character from disappearing during a long simmer. Avoid adding extra brine early for the same reason.
Control salt at the end. Sauerkraut and packaged broth vary considerably in saltiness. Starting with a small amount of salt makes it easier to balance the finished pot. If the soup is too salty, add unsalted water or broth and, if needed, another small potato; do not expect vinegar or sugar to remove the salt.
Adjust thickness with liquid, not a long boil. Split peas naturally make a thick, creamy broth as they break down. Stir regularly because the soup can catch on the bottom, particularly after the potato goes in. If it becomes too thick, add hot water or broth by the 1/4 cup (60 ml), stirring and tasting as you go.

Serving Suggestions

Serve the soup hot as a substantial lunch or a simple supper. Rye bread, sourdough, or dark whole-grain bread is useful for dipping and suits the soup’s earthy peas and sharp sauerkraut. A slice of buttered bread is an easy accompaniment; for a more complete spread, add boiled potatoes or a plate of raw cucumber, radishes, and pickles. Keep additional pickles modest, since the soup already has a salty-sour element.

Fresh dill or parsley gives each bowl a clean, herbal lift. A small spoonful of sour cream is another option if you enjoy a creamy finish; stir it into the individual bowl rather than the pot, so diners can choose. A few drops of neutral oil can soften the sharpness without covering the pea flavor. If you are serving the soup with a salad, choose crisp greens with a restrained dressing rather than another strongly vinegary side.

Variations

Make it vegetarian or vegan: The recipe is already vegan when made with vegetable broth and oil. Water works too, though the soup will have a simpler flavor; add a little more marjoram, black pepper, or chopped herbs at the end rather than increasing the salt automatically. For deeper savory notes, sauté a handful of finely chopped mushrooms with the onion and vegetables.

Use green split peas: Green split peas can replace yellow ones in the same quantity. They may take a little longer to soften and bring a more pronounced, earthy flavor, while the soup will have a greener, less golden appearance. Check tenderness before adding the potato and sauerkraut, and add a splash of broth if a longer simmer reduces the liquid too much.

Change the potato or vegetables: Parsnip can replace some or all of the carrot for a sweeter, more aromatic soup. You can leave out the potato for a more pea-forward bowl, or use an equal amount of peeled celeriac for a mild celery-like note. Cut any replacement into small, even pieces and add it at the same point as the potato so it becomes tender during the final simmer.

Make the flavor more aromatic: Add 1/2 teaspoon (1 g) caraway seeds with the vegetables, or use a pinch of smoked paprika for a gentle smoky note. These are optional additions, not requirements for a single definitive Polish version. If you want a sharper finish, add sauerkraut brine a teaspoon at a time at the table rather than making the whole pot very sour.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours of cooking in shallow, covered containers. The soup keeps for 3 to 4 days in the refrigerator. It will become considerably thicker as the peas absorb liquid, so store a little extra broth separately if you have it, or plan to add water when reheating. Keep garnishes such as fresh herbs and sour cream separate until serving.

Reheat only the portion you need in a saucepan over medium-low heat, stirring frequently and adding broth or water until it reaches your preferred consistency. Heat until steaming throughout; if reheating leftovers, the USDA FSIS safe minimum temperature is 165°F (74°C), checked with a food thermometer. You can also microwave a covered portion in a microwave-safe bowl, stirring once or twice so it heats evenly. Refrigerate any remaining soup promptly rather than leaving it at room temperature.

For longer storage, freeze the cooled soup in freezer-safe containers, leaving a little space at the top for expansion. It is best used within about 2 to 3 months for good flavor and texture. Thaw it overnight in the refrigerator, then reheat as above. Potatoes can become a little softer after freezing and thawing, but the soup remains suitable for a hearty meal; stir well to bring the peas back into an even texture.

Frequently Asked Questions

Do yellow split peas need to be soaked?
No. For this recipe, rinse and sort the peas, then simmer them directly in the broth. Soaking can shorten cooking time, but it is not necessary and makes the timing less predictable. If you choose to soak them, do so in the refrigerator, drain and rinse them, and begin checking for tenderness earlier than the recipe’s stated simmer time.

Why are my split peas still hard?
Peas can take longer to soften when they are older, and cooking conditions vary. Keep them at a gentle simmer and add more hot water or broth if the pot is getting dry. Do not add the sauerkraut until the peas are tender, because acidity can delay softening. If the peas remain firm, simply continue cooking and check every 5 to 10 minutes.

Can I use fresh cabbage instead of sauerkraut?
Fresh cabbage will add sweetness and texture, but it will not provide sauerkraut’s fermented tang or salty seasoning. For a similar amount of cabbage, stir in about 1 1/2 cups (150 g) thinly sliced fresh cabbage with the potato, then add cider vinegar to taste at the end. The result is a milder cabbage-and-pea soup rather than the same sour-salty profile.

Can I make this soup ahead?
Yes. The flavor holds well, and the soup thickens as it rests. Make it up to 3 or 4 days ahead and refrigerate it promptly, then reheat gently with extra broth or water. For the brightest tang, reserve a spoonful of sauerkraut brine and adjust the soup just before serving, since a little acidity can become less noticeable after chilling.

How can I make the soup less sour?
Use a lightly drained measure of sauerkraut, and start with the recipe’s 1 1/2 cups rather than adding extra brine. If the finished soup is still too sharp, dilute it with unsalted broth or water and taste again. A spoonful of sour cream in an individual serving can also mellow the impression of acidity, while more salt is not necessarily the answer.

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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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