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 ↓
Salad Dressing, with Butter
Ingredients
Directions
Make the sauce
Heat the butter in a saucepan until hot.
Add the flour and stir until smooth, being careful not to brown.
Pour in the milk and bring to a boil.
Place the saucepan in another pan of hot water.
Thicken and finish
In a bowl, beat together the eggs, salt, pepper, sugar, and mustard, then add the vinegar.
Stir this mixture into the boiling sauce and stir until it thickens.
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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Butter + milktop 7% of all pairsSmell alikemoderateCooked together81,283 recipes
Shared aroma: (z)-4-heptenal (biscuit, cream).
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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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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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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
- Eggs
- Beaten eggs thicken the sauce as they heat and set.
- Butter
- Adds fat and richness to the sauce.
- Milk
- Forms the liquid base of the sauce.
- Vinegar
- Adds acidity that sharpens the dressing's flavor.
- Sugar
- Adds sweetness to balance the vinegar.
- Mustard
- Adds sharp, savory flavor.
The step that matters
Stirring the egg mixture into the boiling sauce. Egg proteins set with heat, so adding the eggs to very hot liquid without constant stirring can leave lumps or scrambled bits. Stirring keeps the eggs dispersed so the sauce thickens smoothly.
Swap the mustard
How well each one fits the dish's main ingredients (butter, sugar, pepper, milk, vinegar, lemon, egg):
- Capsicumfits better
- Asparagusfits about as well
- Mustardthe original
- Shallotfits about as well
Fit is the average pairing score against butter, sugar, pepper, milk, vinegar, lemon, egg. 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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