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 ↓
Pease Soup
Ingredients
Directions
Prepare the broth
If the broth is too salty, dilute it with water.
Bring the broth to a boil and add the split or whole peas.
Boil for 2 to 3 hours.
If using pea flour, mix it with a little cold broth and stir into the boiling broth for 30 minutes.
Add vegetables and herbs
Add the chopped celery, onion, carrot, and turnip to the boiling broth and cook for about 1 hour.
Add the chopped parsley and mint for the last 20 minutes of cooking.
Season with salt and pepper to taste.
Serve
Serve with small squares of toasted or fried bread and sprinkle with dried mint.
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).
-
Celery + carrottop 1% of all pairsSmell alikestrongCooked together10,173 recipes
Shared aroma: myristicin (spice, warm).
-
Carrot + turniptop 1% of all pairsSmell alikestrongCooked together8,002 recipes
Shared aroma: coumarin (sweet, hay).
-
Celery + parsleytop 1% of all pairsSmell alikestrongCooked together6,810 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Peas + minttop 2% of all pairsSmell alikemoderateCooked together1,137 recipes
Shared aroma: 1-octen-3-ol (mushroom, earthy).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Split peas
- Break down during long boiling to thicken the soup and give it body.
- Broth
- Forms the liquid base that carries the flavour of the whole soup.
- Onion
- Builds savoury depth as it softens into the broth.
- Carrot
- Adds gentle sweetness and colour to the soup.
- Turnip
- Contributes earthy flavour and body as it cooks down.
The step that matters
Adding the pea flour. Pea flour dissolves easily if it is first mixed with cold broth, because stirring dry flour into boiling liquid forms lumps that are hard to smooth out.
Swap the mint
How well each one fits the dish's main ingredients (meat, peas, celery, onion, carrot, turnip, parsley):
- Thymefits better
- Marjoramfits better
- Tarragonfits better
- Mintthe original
Fit is the average pairing score against meat, peas, celery, onion, carrot, turnip, 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 pea 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.

Brown Bread461 recipes
Green Peas229 recipes
Carrot Soup134 recipes
Cream of Celery Soup113 recipes