Hearty Żurek: Polish Sour Rye Soup with Sausage and Egg

Why You’ll Love This Recipe

• Classic Polish comfort: tangy, gently creamy, and deeply savory.
• Balanced flavors: rye sourness meets aromatic marjoram and juicy white sausage.
• Weeknight-friendly with store-bought zakwas; spectacular with homemade.
• Beautiful presentation with a jammy soft-boiled egg in every bowl.

Grocery List

• Produce: Onion, garlic, potatoes, fresh dill (optional)
• Dairy: Sour cream (or heavy cream), eggs
• Pantry: Fresh white sausage (biała kiełbasa), rye sour starter (zakwas), bay leaves, allspice berries, black peppercorns, dried marjoram, broth, salt, horseradish (optional)

Full Ingredients

For the Soup

• 1 lb (450 g) fresh white sausage (biała kiełbasa), ideally raw
• 1 tsp neutral oil
• 5 cups (1.18 L) low-sodium chicken or pork broth
• 1 cup (240 ml) water
• 2 medium potatoes (about 350 g), peeled and diced into 1/2-inch (1.3 cm) cubes
• 1 medium onion (about 150 g), peeled and halved
• 5 garlic cloves, divided (3 for broth, 2 for finishing)
• 2 bay leaves
• 4 allspice berries
• 8 whole black peppercorns
• 1 1/2 tsp dried marjoram, divided (1 tsp for simmering, 1/2 tsp to finish)
• 1 1/4 cups (300 ml) rye sour starter (zakwas), well-shaken
• 1/3 cup (80 ml) sour cream (18%) or heavy cream
• 1 tsp kosher salt, plus more to taste; freshly ground black pepper
• Optional: 2 tsp prepared horseradish; 2 tbsp chopped fresh dill

Optional: Homemade Rye Starter (Zakwas)

• 100 g whole-rye flour
• 400 ml lukewarm filtered water (95–100°F / 35–38°C)
• 2 garlic cloves, lightly crushed
• 2 bay leaves
• 3 whole black peppercorns (optional)

Step-by-Step Instructions

Step 1: Make or Gather the Rye Starter (Zakwas)

If making homemade zakwas, in a 1-quart (1 L) jar combine 100 g rye flour with 400 ml lukewarm water. Stir until smooth. Add 2 crushed garlic cloves, 2 bay leaves, and peppercorns. Cover the jar with a breathable cloth and a rubber band. Ferment at 70–75°F (21–24°C) for 3–5 days, stirring once daily. It should smell pleasantly sour and show bubbles. Strain or shake before using. Measure 1 1/4 cups (300 ml) for the soup. If using store-bought zakwas, shake well before measuring.

Step 2: Brown the Sausage and Build the Broth

Heat 1 tsp oil in a 5–6 quart (4.7–5.7 L) Dutch oven over medium-high. Prick the sausage once or twice, add to the pot, and brown 4–5 minutes. Push sausage to the side; place the onion halves cut sides down and let them lightly char, 2–3 minutes. Pour in 5 cups broth and 1 cup water. Add bay leaves, allspice, peppercorns, and 3 crushed garlic cloves. Bring to a gentle simmer (180–190°F / 82–88°C). Simmer 15 minutes to cook the sausage through and build flavor.

Step 3: Cook the Potatoes and Slice the Sausage

Lift the sausage to a board; cool briefly, then slice into 1/2-inch (1.3 cm) rounds. Add the diced potatoes and 1 tsp kosher salt to the pot. Maintain a gentle simmer until the potatoes are tender, 12–15 minutes. Skim any foam. Keep heat moderate; avoid a rolling boil which can mute the final sourness.

Step 4: Sour the Soup and Season Gently

Reduce heat to low. Remove the pot from direct heat and stir in 1 1/4 cups (300 ml) well-shaken zakwas. Return to the lowest simmer for 5 minutes; do not boil vigorously. Mash the remaining 2 garlic cloves with a pinch of salt to a paste and stir in. Add 1 tsp dried marjoram (crushed between your fingers) and the sliced sausage. Taste and adjust salt; add black pepper and optional 2 tsp horseradish for a subtle kick.

Step 5: Soft-Boil the Eggs

Meanwhile, bring a small saucepan of water to a rolling boil. Gently lower in 4 eggs and cook for exactly 6 minutes for jammy yolks. Transfer to cold water for 1 minute, peel under running water, and halve lengthwise.

Step 6: Finish with Cream and Serve

In a small bowl, whisk 1/3 cup (80 ml) sour cream with 1/2 cup hot soup to temper. Stir back into the pot. Add the remaining 1/2 tsp dried marjoram and 2 tbsp chopped dill if using. Warm 1 minute on low heat without boiling. Ladle into warm bowls and top each with a halved egg. Finish with a pinch of marjoram or dill and freshly ground pepper. Serve immediately.

Pro Tips

• Use raw white sausage if you can; it flavors the broth more deeply than pre-cooked.
• Keep the soup at a gentle simmer after adding zakwas and cream to prevent curdling and preserve bright sour notes.
• Crush dried marjoram between your fingertips to release more aroma.
• For a tangier bowl, increase zakwas to 1 1/2 cups (360 ml) and balance with a pinch of sugar only if needed.
• Żurek gets even better after resting 12–24 hours in the fridge; reheat gently.

Variations

• Smoky Żurek: Brown 2–3 oz (60–85 g) diced smoked bacon with the sausage at the start, or simmer the broth with a small smoked pork bone.
• Vegetarian: Use vegetable broth, skip sausage, and add 4–6 oz (115–170 g) smoked mushrooms or smoked tofu. Finish with extra marjoram and a knob of butter for richness.
• Bread Bowl: Serve in toasted rye or sourdough bread bowls. Brush insides with butter and bake at 375°F (190°C) for 8–10 minutes to crisp.

Storage & Make-Ahead

Refrigerate cooled soup up to 4 days; store eggs and sausage separately for best texture. Reheat gently over low heat until steaming; do not boil. Freeze up to 2 months without the eggs and potatoes (they can turn mealy); add freshly cooked potatoes and eggs after thawing. Zakwas can be made 3–5 days ahead and refrigerated up to 2 weeks in a sealed jar.

Nutrition (per serving)

Approximate: 550 kcal; 34 g fat; 30 g carbohydrates; 27 g protein; 3 g fiber; 1100 mg sodium. Values will vary based on sausage, broth, and cream used.