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 ↓
Mayonnaise Salad Dressing
Ingredients
Directions
Combine mustard, salt, black pepper, and egg yolk in a bowl.
Stir until stiff.
Gradually add olive oil drop by drop while stirring until well combined.
Add a few drops of vinegar.
Continue adding oil and vinegar alternately until finished.
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 + olivetop 8% of all pairsSmell alikestrongCooked together5,950 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Olive + vinegartop 10% of all pairsSmell alikemoderateCooked together12,297 recipes
Shared aroma: isoamyl acetate (banana, fruity).
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Pepper + olivetop 11% of all pairsSmell alikemoderateCooked together30,263 recipes
Shared aroma: 2,4-decadienal (seaweed).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolk
- Emulsifies the oil and vinegar, holding them together as a smooth, thick dressing.
- Olive oil
- Forms the bulk of the dressing and gives it richness and body.
- Vinegar
- Adds acidity that balances the richness of the oil and egg yolk.
- Mustard
- Helps stabilise the emulsion and adds a sharp, savoury note.
The step that matters
Adding the oil gradually. Oil must be added slowly, drop by drop at first, so the egg yolk can disperse it into tiny droplets. Adding it too fast can break the emulsion, leaving a thin, separated dressing.
Swap the mustard
How well each one fits the dish's main ingredients (pepper, egg, olive, vinegar):
- Capsicumfits better
- Cucumberfits about as well
- Tomatofits about as well
- Mustardthe original
Fit is the average pairing score against pepper, egg, olive, 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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