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 ↓
French Salad Dressing
Ingredients
Directions
Make the base
Beat the eggs in a bowl.
Add black pepper, mustard, salt, and vinegar; mix until smooth.
Cook the mixture over low heat until it thickens.
Finish and serve
When ready to serve, fold in the whipped cream.
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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Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Pepper + mustardtop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
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Pepper + vinegartop 14% of all pairsSmell alikemoderateCooked together27,814 recipes
Shared aroma: 4'-methylacetophenone (bitter almond).
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Pepper + creamtop 23% of all pairsSmell alikelowCooked together21,449 recipes
Shared aroma: acetic acid (sour, vinegar).
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Egg + creamtop 24% of all pairsSmell alikelowCooked together42,166 recipes
Shared aroma: acetic acid (sour, vinegar).
Pepper and cream barely smell alike, yet cooks put them together in 21,449 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
- Egg proteins set as they heat, thickening the dressing into a body.
- Vinegar
- Adds sharp acidity that brightens the flavor and balances richness.
- Mustard
- Its natural emulsifiers help keep the dressing smooth and stable, and add sharp flavor.
- Whipped cream
- Adds fat and trapped air, making the dressing lighter and creamier.
The step that matters
Cooking over low heat until it thickens. Egg proteins set gently as they heat and thicken the mixture. If the heat is too high or the mixture is left unstirred, the eggs can scramble into curds. Low heat and steady stirring keep the dressing smooth.
Swap the mustard
How well each one fits the dish's main ingredients (egg, pepper, vinegar, cream):
- Capsicumfits better
- Spinachfits about as well
- Mustardthe original
- Horseradishfits about as well
Fit is the average pairing score against egg, pepper, vinegar, cream. 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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