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 ↓
Mayonnaise Dressing
Ingredients
Directions
Make the base
In a saucepan, melt the butter and stir in the flour until smooth.
Add the milk and cook over medium heat, stirring constantly until thickened.
Finish the dressing
Remove from heat and mix in the beaten eggs, mustard, salt, red pepper, sugar, and vinegar.
Return to heat and stir until the mixture thickens like custard.
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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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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Butter + flourtop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + mustardtop 13% of all pairsSmell alikemoderateCooked together5,066 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
- Butter
- Adds richness and fat, giving the dressing a smooth, mellow mouthfeel.
- Flour
- Thickens the liquid into a smooth base when cooked with the butter.
- Milk
- Forms the liquid base that thickens into a creamy sauce with the flour.
- Eggs
- Set with gentle heat to thicken the dressing into a custard-like texture.
- Vinegar
- Adds acidity that sharpens the flavor and balances the sugar.
- Sugar
- Adds sweetness that balances the sharpness of the vinegar.
The step that matters
Return to heat and stir until the mixture thickens like custard.. Egg proteins set when heated, but overheating can scramble them into lumps. Gentle heat with constant stirring thickens the dressing smoothly.
Swap the mustard
How well each one fits the dish's main ingredients (butter, flour, milk, egg, pepper, sugar, vinegar):
- Capsicumfits better
- Shallotfits about as well
- Mustardthe original
- Chivefits about as well
Fit is the average pairing score against butter, flour, milk, egg, pepper, sugar, 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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