Creamy Celeriac Soup with Crispy Smoked Bacon
Silky celeriac soup enriched with sour cream and bone broth, crowned with shatteringly crisp smoked bacon. A classic Central European winter soup.
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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- Celery
- Dairy
- Gluten
Additional notes
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Warning
High sodium content — approximately 680mg per serving from the combination of smoked bacon and bone broth, before any added salt. Individuals with hypertension, kidney disease, or on sodium-restricted diets should use low-sodium broth and taste before adding salt.
Use unsalted homemade bone broth and reduce bacon to 150g. Season only at the end after tasting.
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Caution
Contains dairy (butter, full-fat sour cream). Not suitable for those with lactose intolerance or dairy allergies without substitution.
Substitute sour cream with full-fat coconut cream or dairy-free sour cream. The flavour profile will change but the texture will hold.
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Caution
Contains gluten (flour used as thickener). Not suitable for those with coeliac disease or gluten sensitivity without substitution.
Replace the teaspoon of flour with an equal amount of cornstarch or potato starch stirred into the sour cream.
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Caution
Contains celeriac, a regulated celery allergen under EU Regulation 1169/2011. Always declare to guests with celery allergies.
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Note
Celeriac is an excellent source of Vitamin K, Vitamin C, and phosphorus. It is lower in calories than potato and has a lower glycemic index, making it a suitable base for those monitoring blood sugar.
- 1
Prepare the celeriac: Peel the celeriac heads thoroughly — the skin is tough and bitter. Cut into thin, even cubes roughly 1cm in size.
Tip Work quickly once peeled — celeriac oxidises and browns on contact with air. A squeeze of lemon juice in a bowl of cold water keeps the cubes white if you need to prep ahead. - 2
Sauté the base: Melt the butter in a large saucepan over medium heat. Add the celeriac cubes and sauté gently for 4–5 minutes until slightly softened and fragrant. Do not brown.
- 3
Simmer: Pour in the 2 liters of cold bone broth or water. Bring to a gentle simmer. Cook uncovered for 20–25 minutes until the celeriac is completely tender when pierced with a knife.
Tip Starting with cold liquid draws more flavour from the celeriac. The original recipe is specific about this. - 4
Thicken: In a small bowl, stir the teaspoon of flour into the sour cream until completely smooth — no lumps. About 10 minutes before serving, ladle a little hot broth into the sour cream mixture to temper it, then stir it into the soup. Bring back to a gentle simmer for 3–4 minutes to cook out the flour.
Tip Tempering the sour cream prevents curdling. Never add cold sour cream directly to boiling soup. - 5
Fry the bacon: While the soup simmers, remove the hard outer skin from the bacon. Cut into finger-width slices, then finely dice. Heat the lard in a small heavy pan over high heat. Add the bacon and fry until deeply browned, caramelised, and shatteringly crisp. Drain on paper towel.
Tip High heat and patience are essential. The bacon must be truly crisp — it will soften quickly in the hot broth if underdone. - 6
Serve: Place a generous spoonful of crispy bacon in the bottom of each bowl. Ladle the hot soup directly over the bacon and serve immediately.
Tip Serving the bacon under the soup rather than on top is the traditional presentation — it softens slightly and perfumes the soup from below.
Nutrition Information per 1 portion (approx. 380ml)
Nutritional values are approximate estimates and may vary based on specific ingredients used, preparation methods, and portion sizes.
Serving Suggestions
Serve as a first course with crusty rye bread or as a light main with a slice of dark bread and butter. A small grating of fresh horseradish over the finished bowl adds a sharp, traditional accent.
About This Recipe
This is the kind of soup that Central European grandmothers made without measuring anything — celeriac softened in butter, simmered in good broth, finished with a spoonful of sour cream, and crowned with bacon fried so crisp it almost shatters. The celeriac provides a quiet, earthy sweetness; the sour cream adds body without heaviness; the bacon does everything else. Simple, unfussy, and deeply satisfying.
Why It Works
The sequence of cold liquid added to sautéed celeriac is deliberate — starting cold allows the celeriac’s flavour to leach gradually into the broth rather than seizing on contact with boiling liquid. The flour-in-sour-cream liaison is a classical Central European technique: a fraction of the thickening power of a roux, but with a characteristic slight tang that brightens the finished soup rather than flattening it.
The bacon needs to be fried far beyond what most modern recipes would call “done.” The Maillard reaction at high heat produces deep caramelised compounds that a pale, rubbery rasher cannot. This is not garnish. It is seasoning.
Getting the Celeriac Right
Celeriac is not forgiving to peel casually. The skin is thick, knobbly, and bitter. Use a sharp knife to cut off the top and bottom first, then stand it upright and slice the skin off in vertical strips. Any brown spots in the flesh should also be cut away — they are fibrous and slightly bitter. Once peeled and cubed, work quickly or keep the pieces in acidulated water (water with a squeeze of lemon) until ready to use.
Make It a Meal
This soup is substantial enough to serve as a light main course with good bread. For a more filling version, add two medium-diced potatoes to the celeriac at step 1 — they will dissolve partially into the broth and create a thicker, more chowder-like body without any additional flour.
A classic of early 20th century home cooking, preserved and adapted for the modern kitchen.
The Story Behind This Recipe
Historical Context
Celeriac soups thickened with sour cream were a staple of Central European middle-class autumn and winter cooking in the early 20th century. The technique of finishing soups with a sour cream and flour liaison — rather than a butter roux or cream — was characteristic of the broader region, producing a lighter, slightly tangy body distinct from French cream soups. Deeply fried, caramelised bacon was both a garnish and a seasoning, a practical way to add smokiness and texture without additional spices.
Modern Kitchen Adaptation
The original recipe calls for bone broth as the preferred liquid, with water as an alternative. A good homemade or store-bought bone broth transforms this soup significantly — the gelatin body and depth it adds cannot be replicated with water alone. If using water, add a small piece of parsley root or parsnip to the simmer for complexity. Full-fat sour cream (minimum 20% fat) is essential — low-fat versions will curdle.
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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