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
Make the dressing
Beat the yolks of the eggs in a bowl.
Add the butter, cream, vinegar, and mustard to the yolks. Mix well.
Place the bowl over a pan of boiling water and stir until the mixture thickens slightly, like boiled custard.
Finish and season
Once cooled, thin the dressing with lemon juice.
Season with pepper and salt to taste.
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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Vinegar + mustardtop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + creamtop 8% of all pairsSmell alikemoderateCooked together41,516 recipes
Shared aroma: delta-dodecalactone (sweet, creamy).
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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
- Emulsify and thicken the dressing as they set gently over heat.
- Butter
- Adds richness and body, helping the dressing feel smooth and creamy.
- Cream
- Adds moisture and softness, mellowing the sharpness of the vinegar.
- Vinegar
- Provides acidity that brightens the dressing and balances the richness.
- Prepared mustard
- Helps stabilize the emulsion and adds a sharp, savory note.
The step that matters
Thickening over boiling water. Egg yolks thicken when gently heated but can scramble if the heat is too high. Stir constantly over simmering, not boiling, water and stop once the mixture coats a spoon slightly, like custard.
Swap the mustard
How well each one fits the dish's main ingredients (egg, butter, cream, vinegar, lemon, pepper):
- Capsicumfits about as well
- Spinachfits about as well
- Asparagusfits about as well
- Mustardthe original
Fit is the average pairing score against egg, butter, cream, vinegar, lemon, 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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