Why it works: Celery and mustard are a kitchen classic. They rank in the top 3% of all ingredient pairs, and 4,160 recipes mention both. Both carry guaiacol, which smells smoky, sweet. The science ↓
The recipe
8 persons (also listed as 16 persons)Ingredients
Contains: egg, milk, wheat (auto-detected from the ingredients and method; we can miss things, so check labels)
Also mentioned in the method: butter
Directions
Make the soup
Boil the vegetables in the water for 2½ hours; stir often, adding more water if it boils away too quickly, so that there are 2 quarts of soup when done.
Mix butter, flour, mustard, salt, and pepper with a teacupful of cold water in a basin.
Stir the mixture into the soup and boil for 10 minutes.
Prepare the yolks of the eggs in the tureen; pour them into the soup, stir well, and serve.
Prepare and toss the vegetables
Cut up the onions, carrots, and turnips; wash and drain them well.
Put the vegetables in the stewpan with butter and powdered sugar.
Toss the mixture over a sharp fire for 10 minutes, without letting them brown.
When done, pour the stock or boiling water over them.
Stew and strain
Add the bread, celery, herbs, and seasoning.
Stew for 3 hours; skim well and strain it off.
When ready to serve, add a little sliced carrot, celery, and turnip, and flavor with a spoonful of Harvey's sauce or a little ketchup.
Alternative method
Peel the vegetables and cut them into small pieces.
Toast the bread until brown, then put all into a stewpan with water and seasoning.
Simmer gently for 3 hours, or until all is reduced to a pulp.
Pass the soup through a sieve in the same way as pea-soup, so it resembles pea-soup in consistency, but it should be a dark brown colour.
Warm it up again when required.
Add Harvey's sauce and, if necessary, add to the flavouring.
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. See the original page.
The picture is an illustration, not a photo of this recipe · Contact us to use it
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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Celery + mustardtop 3% of all pairsAroma overlapmoderateMentioned together4,160 recipes
Shared aroma: guaiacol (smoky, sweet).
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Celery + peppertop 3% of all pairsAroma overlapstrongMentioned together16,001 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Celery + potatotop 4% of all pairsAroma overlapstrongMentioned together2,045 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Mustard + potatotop 4% of all pairsAroma overlapstrongMentioned together1,339 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + potatotop 5% of all pairsAroma overlapstrongMentioned together8,303 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Flour
- Thickens the soup as it cooks with the butter and mustard.
- Eggs
- Yolks enrich and thicken the soup when stirred in at the end.
- Potatoes
- Break down during long simmering to give the soup body.
- Onions
- Build savoury depth as they soften in the stock.
- Carrots
- Add natural sweetness and colour to the soup.
- Celery
- Adds a fresh, aromatic savoury note to the stock.
The step that matters
Adding the egg yolks. Egg yolk proteins set when heated, so they can curdle into lumps if poured into boiling soup. Adding them off the heat and stirring well lets them thicken the soup smoothly.
Flavor stand-ins for the potato
How well each one fits the dish's main ingredients (flour, celery, sugar, pepper, sauce, mustard, egg):
- Capsicumbetter flavor fit
- Horseradishbetter flavor fit
- Carrotabout as good a flavor fit
- Potatothe original
Fit is the average pairing score against flour, celery, sugar, pepper, sauce, mustard, egg. 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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