Kapuśniak (Polish Sauerkraut Soup with Pork Ribs)

Polish kapuśniak is a robust sauerkraut soup prized for its sharp, savoury depth and warming broth. In this version, pork spare ribs give the soup body as they simmer with onion, bay, allspice and peppercorns, while potatoes, carrot and celery make it substantial enough for dinner. The sauerkraut stays central: tangy, slightly softened and rounded by the meaty stock rather than muted. Served piping hot, especially with rye bread, it is the kind of soup that feels even fuller after resting, making it well suited to cooking ahead and reheating gently.
Cuisine style Polish comfort food
Cooking style Slow-cooked • Make-ahead friendly • Freezer-friendly
Time commitment Slow-cooked

Why this recipe works

  • Layered savoury flavour: Pork ribs build a rich broth while sauerkraut adds acidity and depth, keeping the soup hearty without feeling heavy.
  • Gentle simmering: A steady simmer tenderises the ribs and draws flavour from the bones, spices and onion without making the broth muddy.
  • Better after resting: The sauerkraut, pork and vegetables meld as the soup sits, making leftovers especially well-rounded the next day.

Get the most out of this recipe

Ingredient notes

  • Managing sauerkraut sharpness: Very tangy sauerkraut can be briefly rinsed and squeezed dry before simmering. Taste at the end before adding more salt, as sauerkraut varies widely.
  • Choosing the ribs: Pork spare ribs give the broth body and a meaty finish. Beef short ribs make a deeper, darker variation if preferred.

Timing notes

  • Most of the time is hands-off: The active work is mainly skimming, straining, pulling the meat and cutting the vegetables; the flavour develops during the long simmer.
  • Excellent the next day: Resting gives the broth and sauerkraut time to mellow together, so the soup often tastes fuller after refrigeration.

Common mistakes

  • Avoid a hard boil: Keep the broth at a gentle simmer. Vigorous boiling can cloud the soup and make the meat less tender.
  • Do not add vegetables too early: Potatoes, carrots and celery should go in after the meat is tender, so they soften without collapsing.

Serving ideas

  • Serve with rye bread: Dense rye bread is the classic partner, useful for soaking up the tangy, pork-rich broth.
  • Keep garnishes simple: A little fresh dill or parsley can add freshness, but the soup is complete without extra toppings.

Equipment you'll need

Ingredients
Instructions
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  1. Put the pork spare ribs in a stockpot with the water. Add the onion, bay leaves, allspice berries, black peppercorns and 1 tsp of the fine sea salt, then bring to a gentle simmer. Skim any foam from the surface for the first 10 minutes.
  2. Keep the pot at a steady simmer, partially covered, until the ribs are tender and the broth tastes meaty. Turn the ribs once or twice so they cook evenly. If the liquid drops too much, top up with a little more water.
  3. Lift out the ribs and set aside until cool enough to handle. Strain the broth back into the pot to remove the spices and onion. Pull the meat from the bones, discarding excess fat and any small bones, then return the meat to the pot.
  4. Add the sauerkraut to the broth and simmer for 10 minutes to soften and round out the tang. Meanwhile, peel the potatoes and cut into bite-size pieces; peel the carrots and slice, then slice the celery. Add the potatoes, carrots and celery to the pot.
  5. Simmer until the potatoes are tender and the vegetables are soft but not falling apart. Taste and season with the remaining fine sea salt if needed. Serve piping hot.

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Recipe notes

Serving suggestions

This recipe pairs well with:

Rye bread

Tips

  • If your sauerkraut is very sharp, rinse it briefly and squeeze it dry before adding, then adjust the fine sea salt at the end.
  • For a clearer broth, keep the soup at a gentle simmer rather than a rolling boil, and skim well at the start.
  • This soup tastes even better the next day once the flavours have had time to mingle.

Substitutions

  • Replace Yukon Gold potato with red potato for a slightly firmer texture that holds its shape well.
  • Replace pork spare ribs with beef short ribs for a deeper, beefier broth.

Storage

  • Refrigerate up to 3 days
  • Cool completely, then refrigerate in a sealed container. Reheat gently in a saucepan over a low simmer until piping hot; add a splash of water if it has thickened. Freeze in portions for up to 3 months and defrost overnight in the fridge before reheating.

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Recipe overview

  • Servings: 4 servings
  • Total time: 1h 50min (25min active)
  • Difficulty: Medium
  • Cuisine: Polish
With serving suggestions One pot Freezer friendly

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