Why it works: Bread and butter are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 27,232 recipes. Both carry delta-decalactone, which smells sweet, creamy. The science ↓
Bread, Sauce
Ingredients
Directions
Make the bread milk
Boil the onion with black pepper in the milk until reduced to a pulp.
Strain the milk over the grated stale bread.
Let the mixture stand for an hour.
Thicken and serve
In a saucepan, mix the butter and flour.
Add the bread mixture to the saucepan.
Boil the mixture together.
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.
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Bread + buttertop 7% of all pairsSmell alikemoderateCooked together27,232 recipes
Shared aroma: delta-decalactone (sweet, creamy).
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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Milk + breadtop 11% of all pairsSmell alikemoderateCooked together11,466 recipes
Shared aroma: 2-undecenal (sweet).
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Onion + peppertop 11% of all pairsSmell alikemoderateCooked together68,474 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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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
- Stale bread
- Soaks up the infused milk and swells, giving the sauce its body and thickness.
- Butter
- Adds richness and fat, carrying flavour and giving a smooth mouthfeel.
- Flour
- Combined with the butter to form a roux that thickens the sauce as it boils.
- Milk
- Liquid base that carries the onion and pepper flavour and becomes the sauce.
The step that matters
Boil the mixture together. Once the flour and butter are combined with the bread milk, the mixture must boil so the starch gelatinises and thickens the sauce. Stopping too early leaves it thin and raw-tasting.
Swap the onion
How well each one fits the dish's main ingredients (pepper, milk, bread, butter, flour):
- Capsicumfits better
- Potatofits better
- Shallotfits better
- Onionthe original
Fit is the average pairing score against pepper, milk, bread, butter, flour. 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.
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