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 ↓
Mayonnaise Dressing
Ingredients
Directions
Prepare
In a bowl, beat the egg yolks well.
Mix in the mustard, flour, and salt.
Cook and finish
Add the vinegar and lemon juice, then cook over low heat until thickened.
Once cooled, thin the mixture with sweet cream to your desired consistency.
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).
-
Mustard + lemontop 11% of all pairsSmell alikestrongCooked together3,816 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Mustard + flourtop 13% of all pairsSmell alikemoderateCooked together5,066 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
Egg and flour barely smell alike, yet cooks put them together in 106,462 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 and thicken the dressing as they set with gentle heat.
- Flour
- Stabilizes the mixture and helps it thicken during cooking.
- Mustard
- Helps bind the oil and yolk mixture and adds sharp flavor.
- Vinegar
- Adds acidity that brightens the dressing and balances richness.
- Lemon juice
- Adds acidity and fresh citrus flavor to the dressing.
- Sweet cream
- Thins the cooked dressing to a pourable consistency and adds richness.
The step that matters
Cook over low heat until thickened. Egg yolks thicken as their proteins set, but high heat can curdle them into lumps. Gentle, steady heat and constant stirring keep the dressing smooth.
Swap the lemon
How well each one fits the dish's main ingredients (egg, mustard, flour, vinegar, cream):
- Raisinfits better
- Avocadofits better
- Vanillafits about as well
- Lemonthe original
Fit is the average pairing score against egg, mustard, flour, 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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