Why it works: Carrot and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 8,053 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓
Chicken Soup
Ingredients
Directions
Make the broth
Boil veal or lamb and chicken in water.
Skim the surface to clear the broth.
Add onions and carrots to the soup.
Stir in salt and pepper.
Let the soup boil gently for nearly 2 hours.
Finish and serve
Mix butter and flour together.
Add the butter and flour mixture to the soup.
Cover the soup for 15 minutes.
Serve in a tureen, garnished with parsley.
For the chicken, add butter and pepper.
Serve the chicken separately.
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.
-
Carrot + parsleytop 1% of all pairsSmell alikestrongCooked together8,053 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Pepper + parsleytop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Carrot + peppertop 6% of all pairsSmell alikestrongCooked together14,555 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Onion + carrottop 6% of all pairsSmell alikemoderateCooked together21,601 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Chicken + oniontop 8% of all pairsSmell alikemoderateCooked together17,814 recipes
Shared aroma: gamma-nonanolactone (coconut, sweet).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Veal or lamb
- Releases flavour and gelatin into the water, giving the broth body and savouriness.
- Chicken
- Adds meaty flavour to the broth and is served separately as a second course.
- Onions
- Contribute sweetness and aroma as they soften and release their flavour into the broth.
- Carrots
- Add gentle sweetness and colour to the broth as they cook.
- Flour
- Thickens the soup slightly when mixed with butter and stirred in.
The step that matters
Skim the surface to clear the broth. Foam and fat rising during the first boil can cloud the broth and give it a greasy taste. Skimming early keeps the soup clear and clean-tasting.
Swap the onion
How well each one fits the dish's main ingredients (veal, chicken, carrot, pepper, butter, flour, parsley):
- Leekfits better
- Capsicumfits better
- Potatofits better
- Onionthe original
Fit is the average pairing score against veal, chicken, carrot, pepper, butter, flour, parsley. 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 chicken 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.

Chicken Broth257 recipes
Carrot Soup134 recipes
Creamed Chicken89 recipes
Chicken Panada75 recipes