Polish Sauerkraut Soup (Kapusniak)

This is a hearty, sour, smoky, and deeply comforting traditional Polish soup. Kapusniak varies by region but always revolves around sauerkraut and smoked meat. It’s perfect for cold days and even better the next day.

Ingredients

• 2 tablespoons butter or bacon fat

• 1 large onion, diced

• 2 carrots, diced

• 2 parsnips, diced (or 1 small celery root)

• 1 lb (450g) smoked pork: kielbasa (kiełbasa), ribs, hock, or bacon, cut into chunks

• 1 lb (450g) sauerkraut (from a jar or bag, not canned), with its juice

• 8 cups (2 liters) meat or vegetable broth (or water)

• 2 bay leaves

• 5-6 allspice berries (or ¼ tsp ground allspice)

• 5-6 dried porcini mushrooms (optional, for depth)

• 1 large potato, peeled and diced

• 1 tablespoon tomato paste

• 1 teaspoon dried marjoram

• Salt and black pepper to taste

• To serve: Fresh dill or parsley, sour cream, crusty rye bread

Step-by-Step Instructions

1. Build the Base

1. In a large soup pot, melt the butter or bacon fat over medium heat. Add the diced onion and cook until soft and translucent (5-7 mins).

2. Add the diced carrots and parsnips. Cook for another 5 minutes, stirring occasionally.

2. Add the Smoky Heart

1. Add the smoked meat (kielbasa, ribs, etc.) to the pot. Sauté for a few minutes to release its smoky flavor.

2. Add the sauerkraut along with its juice. Stir and cook for 5 minutes.

3. Pour in the broth. Add the bay leaves, allspice, and dried mushrooms (if using).

3. Simmer to Develop Flavor

1. Bring to a boil, then reduce heat to low, cover, and simmer gently for 45 minutes to 1 hour. This allows the meat to become tender and the sauerkraut flavor to mellow into the broth.

4. Final Additions

1. Add the diced potato and tomato paste. Stir well.

2. Continue to simmer, uncovered, for another 20-25 minutes, or until the potatoes are tender.

3. Season with dried marjoram, and taste. Be careful with salt—the smoked meat and sauerkraut are already salty. Add black pepper generously.

5. Finish & Serve

1. Remove the bay leaves, allspice berries, and large mushroom pieces (if used). If you used a pork hock or ribs, remove the bones, shred the meat, and return it to the pot.

2. Ladle the hot soup into bowls. Top with a dollop of sour cream and a generous sprinkle of fresh dill.

3. Serve with thick, dark rye bread for dipping.

Pro-Tips for an Authentic Kapusniak

• Sauerkraut is Key: Use good-quality, fermented sauerkraut (found in the refrigerated section), not the canned, pasteurized kind. The juice is essential for the soup’s signature tang.

• Smoked Meat Variety: Using two kinds of smoked meat (e.g., kielbasa + ribs) creates a more complex flavor. A smoked ham hock is a traditional choice for richness.

• Balance the Sour: If the soup is too tangy for your taste, add a pinch of sugar or grate in a small apple during the final simmer.

• The “Next Day” Rule: Like most stews, this soup tastes even better the next day after the flavors have fully married.

• Vegetarian Version: Omit the meat. Use vegetable broth, add more mushrooms (fresh and dried), and a spoonful of smoked paprika for that essential smoky note.

Storage & Reheating

• Refrigerate cooled soup in an airtight container for up to 5 days.

• Freeze (without sour cream or potato for best texture) for up to 3 months.

• Reheat gently on the stovetop, adding a splash of broth or water if it has thickened.

Enjoy this robust, soul-warming taste of Polish tradition!