Lamb and Spinach Soup with Egg and Yogurt
A hearty Central European lamb and spinach soup thickened with tempered egg yolks and sour milk — rich, tangy, and deeply satisfying.
Historical recipe
Modernised adaptation of an early 20th‑century source. Not independently tested by Attic Recipes. Quantities, temperatures, and food safety guidance have been updated for a contemporary kitchen — we cannot guarantee accuracy or results. Always follow current food safety guidelines for your region. If you have a health condition, allergy, or dietary requirement, consult a qualified professional before preparing this recipe.
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- Dairy
- Eggs
- Gluten
Safety note
Contains raw egg yolks added at the end of cooking without reaching a full boil. The tempered mixture is heated but not fully pasteurized. Not suitable for pregnant women, young children under 5, elderly people, or immunocompromised individuals.
Use pasteurized egg yolks, or substitute with 2 tablespoons of heavy cream stirred in at the end for a safe, similarly rich result.
Additional notes
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Warning
If using vermicelli, this soup contains gluten. If using rice, it is gluten-free. Choose accordingly when serving guests with celiac disease or gluten sensitivity.
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Warning
High saturated fat content (14g per serving) from lamb, butter, and egg yolks combined. Those with cardiovascular conditions or high cholesterol should be aware.
Use lean lamb leg instead of shoulder, reduce butter to 1 tablespoon, and use low-fat yogurt with one yolk only.
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Caution
Contains dairy (butter, yogurt) and eggs.
Dairy-free yogurt alternatives (such as unsweetened oat or soy yogurt) can be used for the tempering, though the flavor will differ slightly.
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Note
Lamb is a relatively high-purine meat. Those with gout or uric acid sensitivity should consume in moderation.
Substitute with chicken thighs for a lower-purine version with a similar texture and cooking time.
- 1
Brown the lamb: Melt the butter in a large, heavy pot over medium-high heat. Add the lamb pieces and fry, turning occasionally, until browned on all sides. Season with a pinch of salt.
Tip A proper brown — not just grey — on the lamb builds the base flavor of the entire soup. Don't rush this step. - 2
Add greens: Add the finely chopped green onions and spinach to the pot. Stir and fry together with the meat until the spinach has fully wilted and reduced in volume, about 5 minutes.
- 3
Spice and add water: Stir in the paprika and cook for one minute until fragrant. Pour in 1.2–1.6 liters of water. Bring to a boil, then reduce to a low simmer. Cover and cook for 60–75 minutes until the lamb is fully tender.
Tip Add the water gradually — start with 1.2 liters and add more if the soup reduces too much during the long simmer. - 4
Add rice or vermicelli: Add the rice (or vermicelli) and crushed pepper. Continue to simmer on low until fully cooked — about 15–18 minutes for rice, 8–10 minutes for vermicelli.
- 5
Add parsley: Just before removing from the heat, stir in the freshly chopped parsley.
- 6
Temper the egg and yogurt: In a separate bowl, whisk together the sour milk (or yogurt) and egg yolks until smooth. Slowly ladle a spoonful of hot soup into the bowl while whisking constantly — this gradually raises the temperature of the mixture and prevents the eggs from scrambling. Repeat with 2–3 more ladles, then pour the tempered mixture back into the pot, stirring continuously.
Tip Do not boil the soup after adding the egg-yogurt mixture. High heat will cause it to curdle. Keep the heat on the lowest setting and serve immediately. - 7
Serve: Remove from heat and ladle immediately into warmed bowls. Serve hot.
Nutrition Information per 1 portion (approx. 400ml)
Nutritional values are approximate estimates and may vary based on specific ingredients used, preparation methods, and portion sizes.
Serving Suggestions
Serve with crusty white bread or flatbread. A small dish of extra yogurt or sour cream on the side allows guests to adjust the tartness to their preference. Traditionally associated with spring and Easter menus, when fresh young spinach and new-season lamb are both at their best.
About This Recipe
This is a soup that rewards patience twice over — once during the long, slow simmer that tenderizes the lamb, and again during the careful tempering of egg yolks and yogurt that gives the broth its characteristic silky, tangy finish. It is a dish from the Central European spring table, built from the season’s first young spinach and new-season lamb, and finished with the sour dairy that is a cornerstone of the regional kitchen.
Why It Works
The egg-and-yogurt tempering technique is a classical emulsification method. By slowly raising the temperature of the egg yolks before they enter the hot soup, you prevent the proteins from seizing and scrambling. The result is a broth that is neither thin nor starchy, but creamy and slightly thickened, with a gentle tartness from the yogurt that cuts through the richness of the lamb fat. The paprika, added dry to the fat before the water, blooms in the butter and distributes its color and flavor evenly throughout the broth.
Modern Kitchen Tips
- The temper: Never skip the gradual ladling of hot soup into the yogurt-egg mixture. One rushed pour of boiling broth directly into raw yolks will give you egg drop soup.
- The spinach: Fresh is strongly preferred. Frozen spinach can be used but should be thoroughly drained — excess water will dilute the broth noticeably.
- Rice vs. vermicelli: Rice gives a heartier, more substantial texture; vermicelli makes the soup feel lighter and more refined. Both are authentic. Note that vermicelli contains gluten — use rice for a gluten-free version.
- Leftovers: This soup does not reheat well above a simmer — the egg-yogurt liaison will break if boiled. Reheat gently over low heat only.
A classic of early 20th century home cooking, preserved and adapted for the modern kitchen.
The Story Behind This Recipe
Historical Context
Lamb and spinach soups thickened with egg and sour milk are among the oldest preparations in the Central European culinary tradition, closely related to the broader family of egg-thickened chorba soups found across the region. The technique of tempering raw egg yolks with hot broth — rather than adding them directly — reflects a level of technical knowledge common in early 20th century middle-class households, where French-influenced cooking methods had permeated domestic cookbooks.
Modern Kitchen Adaptation
Sour milk (kiselo mleko) is the traditional thickener and can be found in Central European grocery stores; plain whole-milk yogurt is a reliable modern substitute. The original instruction to add a 'tenth of a peppercorn' is a period measure roughly equivalent to ½ teaspoon of coarsely crushed black pepper. For a more acidic finish, a squeeze of fresh lemon juice added alongside the yogurt is an excellent modern addition. Lard is the historically correct fat for browning; butter is used here as a widely available modern alternative.
This recipe is an independent modern adaptation developed from historical sources in the public domain. It is provided for informational and educational purposes only and does not constitute professional dietary, nutritional, or medical advice. Food preparation involves inherent risks. The reader assumes full responsibility for safe food handling, ingredient sourcing, and adherence to current local food safety guidelines. The site operator accepts no liability for outcomes resulting from the preparation or consumption of this recipe.
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