Name: Bread-and-meat Soup
Ingredients: 1 pint boiling water; fat from cold stock; 1 sliced onion; 1 tablespoon catsup; browned flour (as needed); 1 sweetbread, boiled and blanched, cut into dice; fried bread, cut into dice

Why it works: Onion and bread are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 8,676 recipes. Both carry 2,4-decadienal, which smells seaweed. The science ↓

Bread-and-meat Soup

Ingredients

Directions

Prepare the stock

Remove the fat from the top of your cold stock.
Add boiling water and sliced onion to the fat, then cool slowly with the meat for 40 minutes.
Strain the mixture, pressing all the strength out of the meat.

Finish and serve

Stir in catsup and enough browned flour mixed with cold water to thicken.
Add the diced sweetbread to the soup and boil for 1 minute.
Stir in a handful of fried bread and serve.

Recipe from a historical cookbook (Internet Archive).

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.

Onion + breadtop 15% of all pairs

Smell alikemoderate

Cooked together8,676 recipes

Shared aroma: 2,4-decadienal (seaweed).
Onion + flourtop 17% of all pairs

Smell alikemoderate

Cooked together32,460 recipes

Shared aroma: isobutyraldehyde (malty, green).
Flour + breadtop 25% of all pairs

Smell alikelow

Cooked together10,383 recipes

Shared aroma: isobutyraldehyde (malty, green).

Flour and bread barely smell alike, yet cooks put them together in 10,383 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

Browned flour: Thickens the soup as it heats, giving it body.
Sweetbread: Adds a tender, rich meat texture to the soup.
Fried bread: Adds crisp-edged, absorbent bread pieces that soften in the broth.
Sliced onion: Contributes savory aroma and flavor to the stock.

The step that matters

Thickening with browned flour. Flour must be mixed smoothly with cold water before it goes into the hot soup, because dry or lumpy flour clumps and does not thicken evenly. Starch thickens properly only once the liquid is hot and stirred well.

Swap the onion

How well each one fits the dish's main ingredients (flour, bread):

Arrowrootfits better
Shallotfits better
Leekfits better
Onionthe original

Fit is the average pairing score against flour, bread. 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.

Brown Bread461 recipes

White Bread80 recipes

Bread Omelette60 recipes

Oatmeal Bread51 recipes

Like knowing why a recipe works?

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.

Bread-and-meat Soup