Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Cream of Celery Soup
Ingredients
Directions
Make the celery base
Cook the chopped celery in boiling water until very soft.
Strain the celery and reserve the hot liquid.
Make the soup
In a separate pan, melt the butter and stir in the flour to make a roux.
Gradually add the reserved hot liquid and cook until thickened.
Stir in the heated milk, salt, cream, white pepper, and onion juice.
Serve hot.
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.
Photo for illustrative purposes only · 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 their aromas overlap, and how often cooks already put them together.
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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
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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 + milktop 14% of all pairsSmell alikelowCooked together78,219 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
- Celery
- Provides the main flavour and, once softened and strained, the body of the soup.
- Butter
- Adds richness and carries flavour, and with the flour forms the roux that thickens the soup.
- Flour
- Thickens the soup when cooked with butter and the hot celery liquid into a roux.
- Milk
- Adds creaminess and mildness, lightly thinning the thickened base into a smooth soup.
- Cream
- Adds fat and a smooth, rich mouthfeel to the finished soup.
The step that matters
Adding the hot liquid to the roux. Adding the liquid gradually while stirring keeps the flour smooth and lump-free, and cooking it until thickened lets the starch swell fully so the soup has even body.
Swap the white pepper
How well each one fits the dish's main ingredients (celery, butter, flour, milk, cream, onion):
- Nutmegfits better
- Parsleyfits better
- Cinnamonfits better
- White pepperthe original
Fit is the average pairing score against celery, butter, flour, milk, cream, onion. 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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