Why it works: Parsley and celery 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 ↓
Potato Soup
Ingredients
Directions
Prepare
Boil the potatoes until thoroughly done.
Pass the boiled potatoes through a colander.
Return the boiled potatoes to a kettle.
Make the soup
Add the cream, milk, and butter.
If desired, add a little flour to thicken the soup.
Add parsley and celery if you like.
Season with salt and pepper to taste.
Strain the mixture through a sieve.
Serve
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.
-
Parsley + celerytop 1% of all pairsSmell alikestrongCooked together6,810 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Parsley + peppertop 2% of all pairsSmell alikestrongCooked together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Potato + parsleytop 5% of all pairsSmell alikemoderateCooked together2,855 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Celery + peppertop 5% of all pairsSmell alikestrongCooked together16,012 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
-
Potato + celerytop 7% of all pairsSmell alikemoderateCooked together2,047 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
- Potatoes
- Provide the starchy base that gives the soup its body and thickness.
- Cream
- Adds fat and richness, giving a smoother, silkier mouthfeel.
- Milk
- Adds liquid and mild sweetness, diluting the potato into a pourable soup.
- Butter
- Adds fat for richer flavour and a smoother, rounder texture.
- Flour
- Thickens the soup by swelling with liquid when heated, if used.
The step that matters
Strain the mixture through a sieve. Straining removes remaining potato fibres and lumps, so the soup turns smooth; skipping it leaves a grainy texture.
Swap the parsley
The recipe marks parsley as optional. How well each one fits the dish's main ingredients (potato, cream, milk, butter, flour, celery, pepper):
- Nutmegfits about as well
- Parsleythe original
- Thymefits less well
- Tarragonfits less well
Fit is the average pairing score against potato, cream, milk, butter, flour, celery, pepper. 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 potato 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.

Potato Croquettes255 recipes
Cream of Celery Soup113 recipes
Potato Rolls78 recipes
Potato Chips53 recipes