Why it works: Shallot and flour match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 2,081 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Herrings, Sauce for
Ingredients
Directions
Make the sauce
Melt the butter in a saucepan over gentle heat and add the minced shallots. Cook until tender.
Stir in the flour and cook until smooth.
Gradually add the fish stock or water, vinegar, pepper, and bay leaves. Simmer for 10 minutes.
Strain the sauce and mix in the minced herring and additional butter. Heat gently.
Finish and serve
Before serving, mix in the beaten egg yolks when the sauce is slightly cooled.
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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Shallot + flourtop 6% of all pairsSmell alikestrongCooked together2,081 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Shallot + peppertop 11% of all pairsSmell alikemoderateCooked together5,898 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Shallot + vinegartop 12% of all pairsSmell alikemoderateCooked together2,374 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + fishtop 12% of all pairsSmell alikemoderateCooked together4,488 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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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
- Butter
- Enriches the sauce with fat, giving it a smooth, rich mouthfeel.
- Flour
- Thickens the liquid into a smooth sauce as it cooks with the butter.
- Egg yolks
- Add richness and body, thickening the sauce gently when it is cooled slightly.
- Salted herring
- Provides the main savoury, salty flavour and texture of the sauce.
The step that matters
Mixing in the egg yolks. If the sauce is too hot when the beaten yolks go in, they can scramble and turn grainy. Letting it cool slightly first lets the yolks thicken it smoothly.
Swap the shallot
How well each one fits the dish's main ingredients (butter, flour, fish, vinegar, pepper, egg):
- Shallotthe original
- Capsicumfits about as well
- Chivefits about as well
- Asparagusfits about as well
Fit is the average pairing score against butter, flour, fish, vinegar, pepper, egg. 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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