Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Mayonnaise Dressing
Ingredients
Directions
In a bowl, beat the egg yolk.
Dissolve the mustard in the lemon juice and add it to the yolk.
Stir in the vinegar, salt, and pepper.
Gradually pour in the oil while whisking until you reach the desired consistency.
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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Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
Mustard + lemontop 11% of all pairsSmell alikestrongCooked together3,816 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Vinegar + peppertop 14% of all pairsSmell alikemoderateCooked 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 yolk
- Lecithin in the yolk emulsifies the oil and water, holding the dressing together and giving it body.
- Mustard
- Acts as a secondary emulsifier, helping the oil and lemon juice stay blended and stable.
- Lemon juice
- Adds acidity that brightens the flavour and helps balance the richness of the oil.
- Oil
- Forms the fat phase that gives the dressing its thick, creamy texture when emulsified.
The step that matters
Gradually pour in the oil while whisking. Adding oil slowly lets the yolk coat each droplet and form a stable emulsion. Pouring too fast can break the mixture into separated oil and liquid.
Swap the mustard
How well each one fits the dish's main ingredients (egg, lemon, vinegar, pepper):
- Capsicumfits better
- Spinachfits about as well
- Shallotfits about as well
- Mustardthe original
Fit is the average pairing score against egg, lemon, vinegar, pepper. 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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