Why it works: Mustard and cucumber match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and 2,281 recipes mention both. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
Tartaric Sauce
Ingredients
Directions
In a bowl, beat the egg yolks and olive oil together until well combined.
Add the lemon juice or vinegar, mustard, salt, onion juice, and pepper, mixing thoroughly.
Stir in the chopped cucumber pickles.
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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Mustard + cucumbertop 3% of all pairsAroma overlapstrongMentioned together2,281 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Lemon + peppertop 3% of all pairsAroma overlapstrongMentioned together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Mustard + oniontop 6% of all pairsAroma overlapstrongMentioned together9,259 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Olive + cucumbertop 6% of all pairsAroma overlapstrongMentioned together3,611 recipes
Shared aroma: 2-methylbutyl acetate (fruit).
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Olive + lemontop 7% of all pairsAroma overlapmoderateMentioned together11,922 recipes
Shared aroma: 3-hexenal (apple, fruity).
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 and lemon juice, giving the sauce its thick, creamy body.
- Olive oil
- Provides fat that, emulsified with the yolks, makes the sauce rich and smooth.
- Lemon juice or vinegar
- Adds acidity that brightens the sauce and balances the richness of the oil.
- Mustard
- Its natural emulsifiers help hold the sauce together and add sharp flavour.
- Cucumber pickles
- Add crunch and sweet-sour flavour that cut through the richness.
The step that matters
Beating the egg yolks and olive oil together. Egg yolks are emulsifiers that bind oil and liquid into a stable, thick sauce. Adding the oil too quickly or not beating enough can cause it to separate, so it should be combined until well blended before the acid is added.
Flavor stand-ins for the onion
How well each one fits the dish's main ingredients (egg, olive, lemon, mustard, pepper, cucumber):
- Lettucebetter flavor fit
- Broccolibetter flavor fit
- Spinachbetter flavor fit
- Onionthe original
Fit is the average pairing score against egg, olive, lemon, mustard, pepper, cucumber. 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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