Why it works: Celery and onion are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 18,518 recipes. Both carry guaiacol, which smells smoky, sweet. The science ↓
Cream of Celery Soup
Ingredients
Directions
Prepare the celery
Wash, scrape, and cut the celery into short lengths.
Cover with water and stew until very soft, then strain through a colander.
Make the soup
Whip the cream for a few moments and skim off 1 cup of the froth.
Add the remaining cream, baking soda, and soup stock to the creamed celery and heat.
When it approaches boiling, thicken with the flour mixed in a little cold milk.
Season with salt and pepper, adjusting to taste.
If the stock is not flavored with onion, add a slice to the soup after thickening and let it stand briefly.
Serve
Serve in bouillon cups with a teaspoon of frothed cream on each.
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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Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Celery + flourtop 15% of all pairsSmell alikemoderateCooked together6,905 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Celery + white peppertop 17% of all pairsSmell alikelowCooked together853 recipes
Shared aroma: myrcene (balsamic, herbaceous).
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Flour + oniontop 17% of all pairsSmell alikemoderateCooked together32,460 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and milk barely smell alike, yet cooks put them together in 78,219 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 flavor and, once stewed and strained, the body of the soup.
- Sweet cream
- Adds richness and a smooth, velvety texture to the soup.
- Flour
- Thickens the soup as it heats, giving it body.
- White stock
- Supplies the liquid base and savory flavor of the soup.
The step that matters
Thickening with flour. Flour mixed in cold milk before it goes into the hot soup disperses evenly; added dry or to a boiling mixture it clumps and leaves a grainy texture. Heating just to near boiling lets the starch thicken smoothly.
Swap the onion
The recipe marks onion as optional. How well each one fits the dish's main ingredients (celery, cream, flour, milk, white pepper):
- Potatofits better
- Arrowrootfits better
- Leekfits better
- Onionthe original
Fit is the average pairing score against celery, cream, flour, milk, white 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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