Why it works: Celery and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 6,810 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Oyster Soup
Ingredients
Directions
Prepare the broth
Strain the liquor from the oysters and add it to an equal quantity of water.
Bring to a boil and skim the surface.
Make the soup
Add white pepper, celery, butter, and flour, stirring to combine.
Boil for 5 minutes, then add the oysters and cream.
Bring to a boil again, then pour into a tureen.
Serve
Serve with toasted bread and sprinkle with parsley.
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 their aromas overlap, and how often cooks already put them together.
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Celery + parsleytop 1% of all pairsSmell alikestrongCooked together6,810 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Butter + breadtop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + parsleytop 12% of all pairsSmell alikemoderateCooked together16,675 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Oysters
- Provide the main flavour and tender texture of the soup.
- Butter
- Adds richness and carries flavour through the broth.
- Flour
- Thickens the broth slightly so it feels smooth and body-rich.
- Cream
- Adds richness and a smooth, mellow body to the soup.
- Celery
- Contributes a fresh, savoury aroma and gentle vegetable flavour.
The step that matters
Adding the oysters and cream after the 5-minute boil. Oysters toughen and shrink when overcooked, so they should be added near the end and only brought back to a boil briefly. Cream can curdle or separate if boiled hard for long, so keep the final heating gentle and short.
Swap the white pepper
How well each one fits the dish's main ingredients (oyster, celery, butter, flour, cream, bread, parsley):
- Capersfits better
- Nutmegfits better
- Tarragonfits better
- White pepperthe original
Fit is the average pairing score against oyster, celery, butter, flour, cream, bread, parsley. Candidates are from the same food group and used in at least 100 recipes.
“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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