Why it works: Mustard and vinegar are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 14,067 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Salad Mixture
Ingredients
Directions
Sieve the hard‑boiled egg yolks into a bowl.
Add the mustard, salt, Worcestershire sauce or mushroom ketchup, salad oil, vinegar, and pepper, then stir well to combine.
Pour over salads according to the quantity needed.
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 + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + saucetop 13% of all pairsSmell alikemoderateCooked together2,120 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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Vinegar + white peppertop 20% of all pairsSmell alikelowCooked together1,154 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + white peppertop 21% of all pairsSmell alikelowCooked together2,312 recipes
Shared aroma: 2-methylbutyraldehyde (malty, chocolate).
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Mustard + white peppertop 25% of all pairsSmell alikelowCooked together618 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Sieved yolks emulsify with the oil and vinegar, giving the dressing a smooth, thick body.
- Salad oil
- Supplies the fat that gives the dressing its richness and silky mouthfeel.
- Vinegar
- Adds acidity that brightens the dressing and balances the richness of the oil and yolks.
- Colman's mustard
- Mustard contains emulsifiers that help hold the oil and yolk mixture together, and adds sharp flavour.
- Worcestershire sauce or mushroom ketchup
- Adds savoury, umami depth that rounds out the flavour of the dressing.
The step that matters
Sieve the yolks finely before adding the other ingredients. Sieving breaks the yolks into fine particles that blend smoothly into the dressing. Lumps left in the yolk stay grainy and do not emulsify well with the oil and vinegar.
Swap the white pepper
How well each one fits the dish's main ingredients (egg, mustard, sauce, vinegar):
- Capersfits better
- Tarragonfits better
- Dillfits better
- White pepperthe original
Fit is the average pairing score against egg, mustard, sauce, vinegar. 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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