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 ↓
Salad Dressing
Ingredients
Directions
Beat the egg yolk in a bowl until stiff.
Gradually add the oil while continuing to beat.
Mix the salt, mustard, red pepper, and white pepper in a separate bowl.
Add the dry mixture to the egg yolk and oil mixture.
Stir in the lemon juice or vinegar.
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.
Photo for illustrative purposes only · Contact us to use it
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 + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Lemon + mustardtop 11% of all pairsSmell alikestrongCooked together3,816 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Lemon + white peppertop 16% of all pairsSmell alikelowCooked together1,658 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Pepper + white peppertop 19% of all pairsSmell alikelowCooked together1,478 recipes
Shared aroma: piperonal (bitter, coconut).
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 water-based acid so the dressing thickens and stays smooth.
- Oil
- Provides fat and body, forming the rich base of the emulsion with the yolk.
- Lemon juice or vinegar
- Adds acidity that brightens flavor and balances the richness of the oil.
- Mustard
- Acts as a second emulsifier and adds sharp flavor that helps hold the dressing together.
The step that matters
Adding the oil gradually. Oil must be added slowly while beating so it breaks into tiny droplets held by the egg yolk. Adding it too fast causes the emulsion to break, leaving a greasy, separated dressing.
Swap the white pepper
How well each one fits the dish's main ingredients (egg, lemon, mustard, pepper):
- Tarragonfits better
- Dillfits better
- Parsleyfits better
- White pepperthe original
Fit is the average pairing score against egg, lemon, mustard, 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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