Why it works: Mustard and capers match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 624 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Tartare Sauce
Ingredients
Directions
Make the sauce
In a bowl, combine the egg yolks and olive oil, whisking until smooth.
Add the vinegar, mustard, sugar, pepper, salt, and onion juice, mixing well.
Stir in the chopped capers and cucumber pickle last.
Serve
Serve with fried or boiled fish, boiled tongue, fish salad, or with fried and broiled meats.
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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Mustard + caperstop 1% of all pairsSmell alikestrongCooked together624 recipes
Shared aroma: coumarin (sweet, hay).
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Olive + caperstop 3% of all pairsSmell alikestrongCooked together1,688 recipes
Shared aroma: coumarin (sweet, hay).
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Mustard + oniontop 6% of all pairsSmell alikestrongCooked together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Onion + caperstop 7% of all pairsSmell alikestrongCooked together1,381 recipes
Shared aroma: coumarin (sweet, hay).
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Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Emulsify with the oil to give the sauce a thick, smooth body.
- Olive oil
- Provides richness and fat that gives the sauce its creamy texture.
- Vinegar
- Adds acidity that brightens the sauce and balances the richness of the oil.
- Prepared mustard
- Helps hold the emulsion together and adds sharp flavour.
The step that matters
Whisking the yolks and oil until smooth. Egg yolks and oil only form a stable, thick emulsion when they are combined slowly and whisked well. If the oil is added too quickly or the mixture is not whisked thoroughly, the sauce can separate or stay thin.
Swap the onion
How well each one fits the dish's main ingredients (egg, olive, vinegar, mustard, sugar, pepper, capers):
- Shallotfits better
- Horseradishfits better
- Lettucefits better
- Onionthe original
Fit is the average pairing score against egg, olive, vinegar, mustard, sugar, pepper, capers. 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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