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
In a bowl, mix mustard, salt, powdered sugar, cayenne pepper, vinegar, and egg yolks.
Gradually add olive oil, starting with a few drops, then increasing to several teaspoons at a time.
As the mixture thickens, add a little vinegar, ensuring it doesn't become sour.
Toward the end, whip in lemon juice.
Optionally, add whipped cream just 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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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Olive + lemontop 7% of all pairsSmell alikemoderateCooked together11,922 recipes
Shared aroma: 3-hexenal (apple, fruity).
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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).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Emulsifiers that hold the oil and vinegar together, giving the dressing its thick body.
- Olive oil
- Provides the fat that, dispersed in droplets, makes the dressing rich and creamy.
- Mustard
- Helps stabilise the emulsion and adds sharpness to the dressing.
- Vinegar
- Adds acidity that balances the richness of the oil and egg yolks.
- Lemon juice
- Adds bright acidity and fresh flavour at the end of mixing.
The step that matters
Adding the olive oil gradually. Oil must be added in very small amounts at first so the egg yolk can emulsify it. Adding too much oil too quickly can break the mixture, leaving it oily and separated instead of thick.
Swap the lemon
How well each one fits the dish's main ingredients (mustard, sugar, pepper, vinegar, egg, olive, cream):
- Lemonthe original
- Avocadofits about as well
- Cherryfits about as well
- Limefits less well
Fit is the average pairing score against mustard, sugar, pepper, vinegar, egg, olive, cream. 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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