Why it works: Mustard and cucumber match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 2,281 recipes. Both carry 2-isopropyl-3-methoxypyrazine, which smells earthy, pea. The science ↓
A Sauce for Cold Meats
Ingredients
Directions
Make the sauce
Beat the 3 eggs, leaving out one white.
Cut the acid jelly into the eggs.
Mix the flour, mustard, and 2 teaspoons of vinegar.
Add the butter and ½ cup of vinegar to the mixture.
Boil the whole mixture, stirring constantly until thick.
Finish
After cooling, chop the green cucumber pickle very finely and mix it in.
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 + cucumbertop 3% of all pairsSmell alikestrongCooked together2,281 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Vinegar + cucumbertop 8% of all pairsSmell alikemoderateCooked together4,734 recipes
Shared aroma: 2-methylbutyl acetate (fruit).
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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).
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
- Eggs
- Thicken the sauce as they set when heated, giving it body.
- Flour
- Thickens the liquid so the sauce becomes smooth and stable.
- Butter
- Adds richness and a smooth, velvety mouthfeel to the sauce.
- Vinegar
- Adds acidity that sharpens the flavour and balances the richness.
- Mustard
- Adds sharp, pungent flavour that complements the acidity.
The step that matters
Boil the whole mixture, stirring constantly until thick. Egg proteins can scramble and curdle if the mixture overheats or sits still. Constant stirring spreads heat evenly so the sauce thickens smoothly.
Swap the cucumber
How well each one fits the dish's main ingredients (egg, flour, mustard, vinegar, butter, sauce):
- Shallotfits better
- Horseradishfits better
- Chivefits better
- Cucumberthe original
Fit is the average pairing score against egg, flour, mustard, vinegar, butter, sauce. 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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