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 ↓
Celery Soup
Ingredients
Directions
Make the soup
Melt the butter in a pan.
Add the celery and stir until coated with butter.
Pour in the water.
Add salt.
Add white pepper.
Boil uncovered until the celery is soft.
Skim off any froth that rises.
Once soft, rub the mixture through a sieve.
Return the soup to the pan and bring to a boil.
Finish with egg and cream
Mix the egg yolk and cream together.
Pour the boiling soup over the egg mixture.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Celery + white peppertop 17% of all pairsSmell alikelowCooked together853 recipes
Shared aroma: myrcene (balsamic, herbaceous).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Egg + milktop 18% of all pairsSmell alikemoderateCooked together88,785 recipes
Shared aroma: 2-nonenal (fatty, green).
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Celery + milktop 21% of all pairsSmell alikemoderateCooked together3,491 recipes
Shared aroma: gamma-decalactone (peach, creamy).
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 body of the soup once cooked and sieved.
- Butter
- Coats the celery and adds richness and a smooth mouthfeel.
- Egg yolk
- Enriches the soup and thickens it slightly when combined with the hot liquid.
- Milk or cream
- Adds moisture and creaminess, softening the flavour and texture of the soup.
The step that matters
Pouring the boiling soup over the egg mixture. Egg yolk can scramble if it meets very hot liquid too fast. Adding the hot soup gradually to the yolk and cream, while stirring, gently warms the yolk so it thickens smoothly instead of curdling.
Swap the white pepper
How well each one fits the dish's main ingredients (celery, butter, egg, milk):
- Parsleyfits better
- Nutmegfits better
- Cinnamonfits better
- White pepperthe original
Fit is the average pairing score against celery, butter, egg, milk. 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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