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
Make the emulsion
Mix the mustard, egg yolks, and salt together in a bowl.
Add the olive oil drop by drop until the mixture begins to thicken.
Thin and finish
Once thickened, add lemon juice or vinegar to thin it out.
Continue alternating adding oil, vinegar, and lemon juice until fully incorporated.
Just before serving, 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.
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).
-
Olive + lemontop 7% of all pairsSmell alikemoderateCooked together11,922 recipes
Shared aroma: 3-hexenal (apple, fruity).
-
Mustard + olivetop 8% of all pairsSmell alikestrongCooked together5,950 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Olive + vinegartop 10% of all pairsSmell alikemoderateCooked together12,297 recipes
Shared aroma: isoamyl acetate (banana, fruity).
-
Mustard + lemontop 11% of all pairsSmell alikestrongCooked together3,816 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Egg yolks
- Their lecithin emulsifies the oil and water so the dressing thickens instead of separating.
- Olive oil
- Forms the fat phase that gives the dressing its rich body and smooth texture.
- Lemon juice
- Adds acidity that brightens the flavor and thins the emulsion as it is added.
- Whipped cream
- Adds air and extra fat, making the finished dressing lighter and softer.
The step that matters
Adding the oil drop by drop at the start. Oil added too quickly overwhelms the egg yolks, which cannot emulsify it, so the mixture breaks and separates. Slow addition lets the yolk lecithin coat the oil droplets and build a stable, thick emulsion.
Swap the lemon
How well each one fits the dish's main ingredients (mustard, egg, olive, vinegar, cream):
- Avocadofits better
- Cherryfits about as well
- Lemonthe original
- Coconutfits about as well
Fit is the average pairing score against mustard, egg, olive, 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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