Why it works: Tomato and celery are a kitchen classic. They rank in the top 4% of all ingredient pairs, and cooks put them together in 3,377 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Tomato Soup
Ingredients
Directions
Combine the soup stock and water in a pot.
Add the canned tomatoes.
Boil for 30 minutes.
Strain and mash the tomatoes through a coarse sieve.
Add the celery, onion, and ground cloves.
Boil together for 1 hour.
If desired, add the tapioca or rice.
Stir in the finely rubbed egg yolk.
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.
-
Tomato + celerytop 4% of all pairsSmell alikemoderateCooked together3,377 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Celery + clovetop 6% of all pairsSmell alikestrongCooked together4,668 recipes
Shared aroma: gamma-decalactone (peach, creamy).
-
Tomato + ricetop 6% of all pairsSmell alikestrongCooked together3,065 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Celery + ricetop 7% of all pairsSmell alikemoderateCooked together2,169 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Canned tomatoes
- Provide the main body and flavor of the soup once simmered and mashed.
- Tapioca or rice
- Thickens the soup slightly as its starch swells during simmering.
- Hard-boiled egg yolk
- Adds richness and a smoother, creamier mouthfeel when stirred in finely rubbed.
Swap the clove
How well each one fits the dish's main ingredients (tomato, celery, onion, rice, egg):
- Turmericfits better
- Parsleyfits better
- Cuminfits better
- Clovethe original
Fit is the average pairing score against tomato, celery, onion, rice, egg. 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.
More tomato soup recipes
You might also like
The free Flavor Lab newsletter: one surprising pairing a week and the molecular reason it works, in 60 seconds. No spam, unsubscribe anytime.
Prefer an account? Create a free account to save pairings and unlock the full chemistry.

Cream of Celery Soup113 recipes
Rice Fritters84 recipes
Tomato Bisque61 recipes
Steamed Rice48 recipes