Why it works: Pepper and lemon 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
Prepare
Chill all utensils and ingredients.
Make the emulsion
In a bowl, mix the salt, mustard, pepper, and egg yolks until smooth.
Add a few drops of vinegar and stir steadily.
Gradually add the olive oil drop by drop as the mixture thickens.
If it becomes too thick, add a few drops of lemon juice to thin it out.
Continue stirring and adding oil and lemon juice until all ingredients are used.
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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Pepper + lemontop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
Olive + lemontop 7% of all pairsSmell alikemoderateCooked together11,922 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Mustard + olivetop 8% of all pairsSmell alikestrongCooked together5,950 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Their lecithin emulsifies the oil and water, holding the sauce together.
- Olive oil
- Forms the fat base that gives mayonnaise its rich body and texture.
- Lemon juice or vinegar
- Adds acidity that balances richness and helps stabilise the emulsion.
- Mustard
- Its compounds help stabilise the emulsion and add a sharp flavour.
The step that matters
Adding the oil gradually. Oil must be added drop by drop at first so the yolk can disperse it into tiny droplets. Adding it too fast breaks the emulsion, and the sauce separates into oily liquid.
Swap the mustard
How well each one fits the dish's main ingredients (egg, pepper, olive, lemon):
- Capsicumfits better
- Spinachfits better
- Asparagusfits better
- Mustardthe original
Fit is the average pairing score against egg, pepper, olive, lemon. 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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