Why it works: Carrot and celery match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 10,172 recipes mention both. Both carry myristicin, which smells spice, warm. The science ↓
The recipe
Ingredients
Contains: egg, milk (auto-detected from the ingredients and method; we can miss things, so check labels)
Directions
Sweat the vegetables
In a stew pan, combine shredded turnips, carrots, celery, green onions, lettuce, chervil, asparagus, and peas with butter and a few spoons of stock.
Cook on low heat for 1 hour to sweat the vegetables.
Simmer the soup
Add enough stock to fill the stew pan and let it simmer on low for another hour.
Make the liaison and finish
In a bowl, beat the egg yolks and gradually mix in the boiled cream, straining it through a fine sieve.
Add the béchamel to the egg and cream mixture.
Remove the soup from heat and stir in the liaison, then return to heat until it just boils, stirring constantly to prevent curdling.
Season with salt and add a small lump of sugar.
Transcribed from a scanned cookbook and modernised for today's kitchens. Where the book gave no heat or time, or said "a moderate oven", the temperatures and times here may be modern equivalents rather than the book's own figures.
Explore the science
The flavor team
The pairs that carry this dish. Each one is judged two ways: how much aroma chemistry they share, and how many recipes mention both.
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Carrot + celerytop 1% of all pairsAroma overlapstrongMentioned together10,172 recipes
Shared aroma: myristicin (spice, warm).
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Lettuce + cherviltop 1% of all pairsAroma overlapstrongMentioned together396 recipes
Shared aroma: coumarin (sweet, hay).
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Turnip + carrottop 2% of all pairsAroma overlapmoderateMentioned together8,001 recipes
Shared aroma: coumarin (sweet, hay).
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Turnip + lettucetop 3% of all pairsAroma overlapstrongMentioned together526 recipes
Shared aroma: coumarin (sweet, hay).
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Turnip + cherviltop 3% of all pairsAroma overlapstrongMentioned together184 recipes
Shared aroma: coumarin (sweet, hay).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Thicken the soup into a smooth, creamy texture when gently heated.
- Cream
- Adds richness and a silky mouthfeel to the finished soup.
- Butter
- Fat that softens the vegetables while they sweat, carrying flavour.
- Béchamel
- Adds body and helps stabilise the liaison against curdling.
The step that matters
Stirring the liaison back over heat. Egg yolks curdle if they get too hot or heat unevenly. Stir constantly and bring the soup only to a bare boil so the yolks thicken it smoothly instead of scrambling.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (butter, turnip, carrot, celery, lettuce, chervil, asparagus):
- Leekbetter flavor fit
- Beetrootbetter flavor fit
- Endivebetter flavor fit
- Onionthe original
Fit is the average pairing score against butter, turnip, carrot, celery, lettuce, chervil, asparagus. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“What each ingredient does” and “The step that matters” were written by Claude from this recipe’s own method and reviewed in samples by CompKitchen.
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