Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Chicken Soup
Ingredients
Directions
Make the base
Combine the chopped chicken or veal with the breadcrumbs in a pot.
Stir in the butter until melted.
Heat the milk until scalding in a separate saucepan.
Mix the flour with the butter. Gradually add the hot milk to this mixture, stirring constantly.
Finish the soup
Pour the mixture over beaten raw eggs, stirring quickly to avoid scrambling.
Add the egg mixture to the chicken and breadcrumbs in the pot.
Drop in the egg-balls and simmer until cooked through.
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.
-
Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
-
Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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
- Chicken or veal
- Provides the meaty body and savoury flavour of the soup.
- Dry seasoned breadcrumbs
- Adds body and absorbs liquid, giving the soup a thicker texture.
- Butter
- Adds richness and fat, carrying flavour through the soup.
- Milk
- Adds creaminess and softness to the broth base.
- Flour
- Thickens the milk mixture so it holds together smoothly.
- Raw egg yolk
- Sets gently when heated, adding richness and body to the egg-balls.
The step that matters
Pour the mixture over beaten eggs, stirring quickly. Eggs begin to set and scramble when they meet hot liquid too fast. Stirring constantly while pouring spreads the heat so the eggs thicken smoothly instead of forming curds.
“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.
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.

Veal Patties50 recipes
Beef, Mutton, or Veal Broth6 recipes
Tomato Soup526 recipes
Brown Bread461 recipes