Why it works: Carrot and celery match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and 10,173 recipes mention both. Both carry myristicin, which smells spice, warm. The science ↓
Tomato Soup
Ingredients
Directions
In a large pot, melt the butter over low heat.
Add the turnips, carrots, onions, celery, and ham. Cook slowly for about 1 hour.
Stir in the diluted stock and chopped tomatoes. Simmer for 1.5 hours.
Pass the mixture through a sieve back into the pot.
Add pepper and salt, then boil for 10 minutes.
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 aroma chemistry they share, and how many recipes mention both.
-
Carrot + celerytop 1% of all pairsAroma overlapstrongMentioned together10,173 recipes
Shared aroma: myristicin (spice, warm).
-
Turnip + carrottop 1% of all pairsAroma overlapstrongMentioned together8,002 recipes
Shared aroma: coumarin (sweet, hay).
-
Turnip + celerytop 2% of all pairsAroma overlapmoderateMentioned together4,418 recipes
Shared aroma: coumarin (sweet, hay).
-
Celery + tomatotop 4% of all pairsAroma overlapmoderateMentioned together3,377 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Celery + peppertop 5% of all pairsAroma overlapstrongMentioned together16,012 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
- Tomatoes
- Provide the main flavour and body of the soup as they break down during simmering.
- Butter
- Adds richness and carries flavour from the vegetables and ham.
- Onions
- Build a sweet, savoury base as they soften slowly in the butter.
- Stock or broth
- Supplies liquid and savoury depth for the soup.
- Ham
- Adds savoury, salty depth as it cooks slowly with the vegetables.
- Turnips
- Contribute body and mild sweetness as they cook down.
The step that matters
Passing the mixture through a sieve. Pushing the cooked solids through a sieve breaks them down and removes fibrous bits, which gives the soup a smooth, even texture. Skipping or rushing this step leaves the soup coarse.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (turnip, carrot, celery, ham, butter, tomato, pepper):
- Parsnipbetter flavor fit
- Leekbetter flavor fit
- Capsicumbetter flavor fit
- Onionthe original
Fit is the average pairing score against turnip, carrot, celery, ham, butter, tomato, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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 Sunday pairing: one pairing, the chemistry behind it, and how to cook it. No spam, unsubscribe anytime.
Prefer an account? Create a free account for sign-in; Pro adds the full results and chemistry.

Carrot Soup134 recipes
Cream of Celery Soup113 recipes
Tomato Bisque61 recipes
Turnip Soup43 recipes