Why it works: Parsley and pepper match in chemistry and in kitchens. They rank in the top 2% of all ingredient pairs, and 34,122 recipes mention both. Both carry 4'-methylacetophenone, which smells bitter almond. The science ↓
Tartare Sauce
Ingredients
Directions
In a small bowl, combine the egg yolks, vinegar, and salt. Whisk sharply until creamy.
Add the mustard, gherkins, parsley, and pepper. Mix well.
While whisking, slowly add the salad oil, drop by drop, until fully combined.
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 aroma chemistry they share, and how many recipes mention both.
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Parsley + peppertop 2% of all pairsAroma overlapstrongMentioned together34,122 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Vinegar + mustardtop 7% of all pairsAroma overlapmoderateMentioned together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Parsley + mustardtop 8% of all pairsAroma overlapstrongMentioned together2,588 recipes
Shared aroma: trans-2-hexenal (green, leafy).
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Mustard + peppertop 9% of all pairsAroma overlapmoderateMentioned together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Vinegar + peppertop 14% of all pairsAroma overlapmoderateMentioned together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Emulsify the oil into the sauce and give it a creamy, thick body.
- Salad oil
- Provides fat that, emulsified with the yolks, forms the thick sauce base.
- Vinegar
- Adds acidity that sharpens the flavour and balances the richness of the oil.
- Made mustard
- Contributes sharp flavour and helps stabilise the emulsion.
The step that matters
Adding the oil. Oil must be added drop by drop while whisking so the egg yolks can emulsify it. Adding it too fast breaks the emulsion, leaving a greasy, separated sauce.
Flavor stand-ins for the mustard
How well each one fits the dish's main ingredients (egg, vinegar, parsley, pepper):
- Capsicumbetter flavor fit
- Shallotbetter flavor fit
- Carrotabout as good a flavor fit
- Mustardthe original
Fit is the average pairing score against egg, vinegar, parsley, pepper. Candidates are from the same food group and used in at least 100 recipes. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).
“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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