Why it works: Horseradish and flour match in chemistry and in kitchens. They rank in the top 10% of all ingredient pairs, and cooks put them together in 743 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Dutch Sauce for Fish
Ingredients
Directions
Make the sauce
Boil vinegar and horseradish in a porcelain saucepan for five minutes.
Strain the mixture and let it cool.
Add egg yolks, butter, flour, water, and salt to the cooled mixture.
Stir over gentle heat with a wooden spoon until the mixture is almost boiling.
Serve
Serve immediately to prevent curdling.
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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Horseradish + flourtop 10% of all pairsSmell alikestrongCooked together743 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Vinegar + horseradishtop 12% of all pairsSmell alikemoderateCooked together2,609 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + buttertop 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
- Egg yolks
- Emulsify and thicken the sauce as they set gently with heat.
- Butter
- Adds richness and a smooth, glossy body to the sauce.
- Vinegar
- Provides acidity that gives the sauce its sharp, tangy bite.
- Flour
- Stabilises the emulsion and adds body so the sauce holds together.
The step that matters
Stir over gentle heat until almost boiling. Egg yolks thicken at moderate temperatures but scramble and curdle if overheated, so gentle, constant stirring with the mixture kept just below boiling keeps the sauce smooth.
Swap the horseradish
How well each one fits the dish's main ingredients (vinegar, egg, butter, flour):
- Shallotfits better
- Chivefits better
- Cucumberfits better
- Horseradishthe original
Fit is the average pairing score against vinegar, egg, 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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