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 ↓
Boiled Salad Dressing
Ingredients
Directions
Prepare
Mix the dry ingredients together.
Add the dry mixture to the slightly beaten egg yolks.
Beat the butter and flour together to form a paste.
Cook
Heat the paste on the stove until it bubbles.
Add the diluted vinegar to the bubbling mixture.
Stir in the egg yolk mixture.
Remove from the stove and beat until smooth.
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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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).
-
Mustard + peppertop 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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
Butter and flour barely smell alike, yet cooks put them together in 124,287 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 yolks
- Thicken the dressing as they set gently with heat, giving it body and richness.
- Flour
- Thickens the liquid into a smooth, stable base when cooked with the butter.
- Butter
- Adds fat for a rich, smooth mouthfeel.
- Sugar
- Adds sweetness to balance the sharpness of the vinegar.
- Diluted vinegar
- Adds acidity that gives the dressing its tangy flavor.
The step that matters
Stir in the egg yolk mixture.. Egg yolks thicken when heated gently but can curdle or scramble if they meet a very hot mixture too quickly. Keep the heat moderate and stir steadily so the dressing stays smooth and thickened.
Swap the mustard
How well each one fits the dish's main ingredients (butter, flour, sugar, pepper, egg, vinegar, lemon):
- Shallotfits about as well
- Capsicumfits about as well
- Mustardthe original
- Arrowrootfits about as well
Fit is the average pairing score against butter, flour, sugar, pepper, egg, vinegar, 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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