Why it works: Vinegar and mustard are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 14,067 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Salad Dressing of Butter
Ingredients
Directions
In a bowl, combine the beaten eggs, sugar, butter, vinegar, mustard, salt, and pepper.
Beat the mixture together until well combined.
Place the bowl over a kettle of simmering water and stir until the dressing 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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Vinegar + mustardtop 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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Vinegar + peppertop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
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Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Eggs
- Egg proteins set as they warm, thickening the dressing into a coating consistency.
- Butter
- Adds fat for richness and a smooth, silky mouthfeel.
- Vinegar
- Provides acidity that gives the dressing its sharp, tangy flavour.
- Sugar
- Adds sweetness that balances the sharpness of the vinegar.
- Mustard
- Adds a sharp, pungent flavour and helps keep the dressing emulsified.
The step that matters
Place the bowl over a kettle of simmering water and stir until the dressing thickens.. Egg proteins set at moderate heat and can scramble if the mixture gets too hot or is not stirred. Gentle, constant stirring over simmering water heats it evenly, so the dressing thickens smoothly.
Swap the mustard
How well each one fits the dish's main ingredients (egg, sugar, butter, vinegar, pepper):
- Capsicumfits better
- Mustardthe original
- Cucumberfits about as well
- Shallotfits less well
Fit is the average pairing score against egg, sugar, butter, vinegar, 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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