Why it works: Celery and parsley match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 6,810 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Vegetable Soup
Ingredients
Directions
Make the broth
Place the shin bone in a pot and cover with water.
Add the celery, onion, and parsley.
Bring to a boil.
Reduce to a simmer for 2 hours.
Add the vegetables and serve
One hour before serving, add the tomato, rice, green beans, and peas.
Continue to simmer until the vegetables are tender.
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 their aromas overlap, and how often cooks already put them together.
-
Celery + parsleytop 1% of all pairsSmell alikestrongCooked together6,810 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Green beans + peastop 2% of all pairsSmell alikestrongCooked together54 recipes
Shared aroma: 2-isobutyl-3-methoxypyrazine (green bell pepper, earthy).
-
Celery + tomatotop 4% of all pairsSmell alikemoderateCooked together3,377 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Tomato + green beanstop 5% of all pairsSmell alikemoderateCooked together113 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Tomato + ricetop 6% of all pairsSmell alikestrongCooked together3,065 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Shin bone
- Releases flavor and body into the broth during long simmering.
- Rice
- Absorbs liquid and thickens the soup as it cooks.
- Green beans
- Add texture and a fresh, tender bite to the soup.
- Peas
- Add sweetness and soft texture to the soup.
The step that matters
Simmering the rice and vegetables after adding them. Adding the rice, green beans, and peas only one hour before serving keeps them from overcooking and turning mushy during the long simmer, while still letting them become tender.
Swap the onion
How well each one fits the dish's main ingredients (celery, parsley, tomato, rice, green beans, peas):
- Carrotfits better
- Cucumberfits better
- Lettucefits better
- Onionthe original
Fit is the average pairing score against celery, parsley, tomato, rice, green beans, peas. 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 vegetable 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.

Green Peas229 recipes
Green Peas Soup35 recipes
Tomato Soup526 recipes
Green Pea Soup181 recipes