Why it works: Mustard and vinegar 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 ↓
Slaw Dressing
Ingredients
Directions
Cream the butter with the flour, salt, mustard, and cayenne pepper.
Add the egg yolk and mix well.
Gradually beat in the vinegar.
Cook in a double boiler until thick.
Once cool, stir in the sugar.
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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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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Flour + buttertop 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).
-
Pepper + vinegartop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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 yolk
- Thickens as it cooks and adds richness and body to the dressing.
- Flour
- Helps stabilise the mixture and adds body as it thickens.
- Butter
- Adds fat and richness, giving the creamed base a smooth texture.
- Vinegar
- Adds sharp acidity that balances the richness of the egg and butter.
- Sugar
- Adds sweetness to balance the sharpness of the vinegar.
The step that matters
Cook in a double boiler until thick. Egg yolk proteins thicken when heated, so gentle, indirect heat sets the dressing smoothly. Too much heat can scramble the yolk, leaving lumps and a grainy texture.
Swap the mustard
How well each one fits the dish's main ingredients (flour, sugar, butter, pepper, egg, vinegar):
- Capsicumfits about as well
- Shallotfits about as well
- Mustardthe original
- Chivefits about as well
Fit is the average pairing score against flour, sugar, butter, pepper, egg, 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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