Why it works: Potato and onion are a kitchen classic. They rank in the top 3% of all ingredient pairs, and cooks put them together in 9,023 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Celery Soup
Ingredients
Directions
Prepare
Chop the potatoes, onions, and celery very finely.
Cook the vegetables
Place the chopped vegetables in a large pot and cover with boiling water.
Stir often until the vegetables are cooked.
Finish the soup
Add 1 quart of milk and bring to a boil.
Season with butter, pepper, and coarse sea salt to taste.
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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Potato + oniontop 3% of all pairsSmell alikemoderateCooked together9,023 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Potato + celerytop 7% of all pairsSmell alikemoderateCooked together2,047 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Onion + celerytop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Break down while cooking to give the soup body and a thick, creamy texture.
- Onions
- Release sugars as they soften, adding sweetness and savory depth to the soup.
- Celery
- Provides the main vegetable flavor and some fresh, aromatic character.
- Milk
- Adds richness and creaminess, softening the soup's flavor and mouthfeel.
The step that matters
Adding the milk and bringing it to a boil. Milk can scorch on the bottom of the pot and curdle or separate if it boils hard, especially in acidic or starchy mixtures. Stirring often and keeping the heat moderate helps keep it smooth.
Swap the celery
How well each one fits the dish's main ingredients (potato, onion, milk, butter, pepper):
- Garlicfits better
- Parsleyfits better
- Thymefits better
- Celerythe original
Fit is the average pairing score against potato, onion, milk, butter, pepper. 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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