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 ↓
Celery Soup
Ingredients
Directions
Prepare the vegetables
Wash the celery.
Scrape the celery.
Cut the celery into thin slices.
Slice the onion.
Make the soup
Melt the butter in a saucepan.
Stir in the vegetables without browning.
Add the stock.
Boil for one hour until tender.
Pass the mixture through a fine sieve.
Return it to the saucepan.
Thicken and finish
Blend the flour and milk together.
Strain the mixture into the boiling soup.
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.
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).
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Celery + oniontop 7% of all pairsSmell alikemoderateCooked together18,518 recipes
Shared aroma: guaiacol (smoky, sweet).
-
Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Celery
- Provides the main flavour and body of the soup as it softens during simmering.
- Butter
- Fat that softens the vegetables gently and carries flavour into the soup.
- Onion
- Adds savoury depth and aroma as it cooks with the butter.
- Second stock
- Liquid base that cooks the vegetables until tender and forms the soup.
- Flour
- Thickens the soup when blended with milk and stirred into the boiling liquid.
- Milk
- Adds creaminess and softness, mellowing the flavour of the soup.
The step that matters
Stir in the vegetables without browning.. Browning the butter and vegetables adds colour and a toasted flavour that changes the pale, delicate taste of the soup. Cooking them gently softens them while keeping the flavour mild.
Swap the onion
How well each one fits the dish's main ingredients (celery, butter, milk, flour, pepper):
- Carrotfits better
- Potatofits better
- Capsicumfits better
- Onionthe original
Fit is the average pairing score against celery, butter, milk, flour, 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 celery 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.
Celery Stew25 recipes
Celery Croquettes16 recipes
Celery Cream Soup15 recipes
Celery Seed Infusion10 recipes