Why it works: Butter and milk are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 81,283 recipes. Both carry (z)-4-heptenal, which smells biscuit, cream. The science ↓
Boiled Salad Dressing
Ingredients
Directions
Mix the dry ingredients in a bowl.
Add the yolks of the eggs and melted butter, then mix well.
Slowly add the milk and vinegar while stirring.
Cook the mixture in a double boiler 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.
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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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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Flour + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Mustard + flourtop 13% of all pairsSmell alikemoderateCooked together5,066 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + milktop 14% of all pairsSmell alikelowCooked together78,219 recipes
Shared aroma: isobutyraldehyde (malty, green).
Flour and butter 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
- Emulsify the fats and liquids and set into a thick, creamy texture when heated.
- Flour
- Thickens the dressing as its starch swells and gelatinizes during cooking.
- Melted butter
- Adds fat for richness, smoothness and a mellow flavour.
- Milk
- Supplies liquid that makes the dressing smooth and pourable before it thickens.
- Vinegar
- Adds acidity that gives the dressing its tang and balances the richness.
- Mustard
- Helps stabilise the emulsion and adds a sharp, savoury bite.
The step that matters
Cook the mixture in a double boiler until it thickens. Egg yolks can curdle or scramble if overheated. A double boiler applies gentle, indirect heat, and stirring keeps the yolks evenly warmed so the mixture thickens smoothly.
Swap the white pepper
How well each one fits the dish's main ingredients (mustard, flour, egg, butter, milk, vinegar):
- Capersfits better
- Tarragonfits better
- Cinnamonfits better
- White pepperthe original
Fit is the average pairing score against mustard, flour, egg, butter, milk, vinegar. 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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