Polish Sour Rye Soup

Żurek

A uniquely Polish soup made from fermented rye flour. Tangy, hearty, and traditionally served in a bread bowl. An Easter essential.

Prep: 5 days (for starter) + 20 minCook: 40 minServes: 6Medium

Ingredients

  • For the zakwas (sourdough starter):
  • 1 cup rye flour
  • 3 cups warm water
  • 2 cloves garlic (crushed)
  • 2 bay leaves
  • 5 allspice berries
  • For the soup:
  • 2 cups zakwas (rye starter)
  • 6 cups chicken or vegetable broth
  • 1/2 lb kielbasa (sliced)
  • 4 hard-boiled eggs (halved)
  • 1 cup heavy cream or sour cream
  • Salt and white pepper to taste
  • Fresh marjoram or dried marjoram
  • Round bread loaves for serving (optional)

Instructions

  1. 1

    Make the zakwas (5 days ahead): Mix rye flour and warm water in a jar. Add garlic, bay leaves, allspice. Cover loosely. Leave at room temperature 4-5 days, stirring daily. It should smell pleasantly sour.

  2. 2

    Strain the zakwas through a sieve. Discard solids.

  3. 3

    In a large pot, bring broth to a simmer. Add sliced kielbasa and cook 10 minutes.

  4. 4

    Add 2 cups of strained zakwas. Bring to a gentle boil.

  5. 5

    Stir in cream/sour cream. Add marjoram, salt, and white pepper.

  6. 6

    Simmer 15-20 minutes (don't boil vigorously after adding cream).

  7. 7

    Serve in bowls (or hollowed-out bread bowls!) topped with halved hard-boiled eggs.

Pro Tips

  • You can buy pre-made zakwas at Polish delis to skip the 5-day fermentation.
  • Serving in a bread bowl (chleb) is traditional and impressive.
  • The soup should be distinctly tangy — that's the whole point!