Why it works: Milk and butter 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 ↓
Codfish on Toast
Ingredients
Directions
Prepare the codfish
Soak the shredded codfish in cold water for 1 hour.
Bring the codfish to a boil, then drain it through a colander.
Return the codfish to the skillet with ½ cup cold milk.
Season with butter and pepper.
Make the sauce
Beat the eggs well.
Stir the flour with a little cold milk until smooth.
Add the flour mixture to the codfish and let it boil for a moment.
Serve
Pour the mixture over buttered toast on a platter.
Add a generous dash of dry mustard before cooking or mix it with the flour and milk.
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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Milk + buttertop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 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).
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Flour + mustardtop 13% of all pairsSmell alikemoderateCooked together5,066 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Milk + flourtop 14% of all pairsSmell alikelowCooked together78,219 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
- Codfish
- Provides the main savory flavour and the flaky body of the dish.
- Eggs
- Thicken and enrich the mixture as they set with heat.
- Flour
- Thickens the milk and codfish into a smooth, cohesive sauce.
- Milk
- Adds moisture and creaminess, loosening the flour into a sauce.
- Butter
- Adds richness and fat, carrying flavour through the dish.
The step that matters
Stirring the flour into cold milk until smooth. Flour added directly to hot liquid forms lumps, because its starch granules clump before they can disperse. Mixing it first with cold milk lets the starch spread evenly, so the sauce thickens smoothly when it boils.
Swap the mustard
How well each one fits the dish's main ingredients (milk, butter, pepper, egg, flour):
- Capsicumfits better
- Potatofits better
- Asparagusfits better
- Mustardthe original
Fit is the average pairing score against milk, butter, pepper, egg, 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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