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 Salad Dressing
Ingredients
Directions
Make the base
Combine egg yolk, salt, black pepper, cayenne pepper, dry mustard, and lemon juice or vinegar in a bowl, then mix until smooth.
Add the oil
Gradually add salad oil and vinegar (or lemon juice) a few drops at a time, stirring constantly until all oil and vinegar are incorporated.
Fix a curdled sauce
If mixture curdles, stir in ½ teaspoon of vinegar or lemon juice alone and mix well.
If it still curdles, refrigerate for a while.
If it does not improve, start over with another yolk and gradually stir in the curdled sauce.
Finish
For a white mayonnaise, use egg white instead of the yolk.
Refrigerate before serving.
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).
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Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mustard + lemontop 11% of all pairsSmell alikestrongCooked together3,816 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Egg + lemontop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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Egg + mustardtop 28% of all pairsSmell alikemoderateCooked together9,210 recipes
Shared aroma: (e)-2-octenal (fatty, green).
Egg and lemon barely smell alike, yet cooks put them together in 44,316 recipes: they work on texture and structure more than aroma.
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolk
- Emulsifier that holds the oil and acid together as a stable, creamy sauce.
- Salad oil
- Provides the fat that gives mayonnaise its rich body and texture.
- Lemon juice or vinegar
- Adds acidity that balances the richness and helps the sauce set.
- Dry mustard
- Acts as a secondary emulsifier that helps keep the sauce from breaking.
The step that matters
Adding the oil gradually. Oil must be added a few drops at a time while stirring constantly so the yolk can disperse it into tiny droplets. Adding it too fast overwhelms the yolk, and the emulsion breaks and curdles.
Swap the mustard
How well each one fits the dish's main ingredients (egg, pepper, lemon):
- Spinachfits better
- Capsicumfits better
- Asparagusfits better
- Mustardthe original
Fit is the average pairing score against egg, pepper, 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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