Why it works: Celery and pepper match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 16,012 recipes. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Potato Soup
Ingredients
Directions
Make the stock
Combine the meat liquid and bones of the fowl or rabbit with a little salt in a clean pan.
Boil for a few hours until reduced to about 3 pints, then skim and strain carefully.
Flavour and thicken
Add the bacon, herbs, pepper, celery, and shallots to a small pan and sweat them without browning.
Pour about ½ pint of the meat liquid over the sautéed vegetables and boil for an hour.
Press the herbs and strain the liquid back into the first pot.
Boil the cornflour and milk in a bowl.
Beat in the cooked egg and mashed potatoes until smooth.
Gradually add the stock to the potato mixture, stirring well.
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 + 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).
-
Potato + shallottop 9% of all pairsSmell alikemoderateCooked together272 recipes
Shared aroma: 2,4-decadienal (seaweed).
-
Potato + peppertop 9% of all pairsSmell alikemoderateCooked together8,305 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Shallot + celerytop 9% of all pairsSmell alikemoderateCooked together459 recipes
Shared aroma: nonanal (fat, citrus).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Potatoes
- Mashed into the soup to give body and a smooth, thick texture.
- Cornflour
- Thickens the milk into a smooth base that gives the soup body.
- Egg
- Enriches the soup and helps bind and thicken it as it is beaten in.
- Milk
- Adds creaminess and richness to the soup.
- Shallots
- Build a mild savoury sweetness when sweated gently in the base flavour.
The step that matters
Adding the stock to the potato mixture. Adding hot stock too quickly or without constant stirring can cause lumps and uneven thickening. Gradual addition while stirring keeps the starch and egg smooth and evenly dispersed.
Swap the shallot
How well each one fits the dish's main ingredients (rabbit, potato, celery, egg, milk, pepper):
- Capsicumfits better
- Asparagusfits better
- Carrotfits better
- Shallotthe original
Fit is the average pairing score against rabbit, potato, celery, egg, milk, 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