Why it works: Lemon and pepper match in chemistry and in kitchens. They rank in the top 3% of all ingredient pairs, and cooks put them together in 27,047 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓
Mayonnaise Dressing
Ingredients
Directions
Prepare
Chill the egg yolk and oil in the refrigerator until cold.
Make the mayonnaise
In a bowl, beat the egg yolk with a fork.
Slowly add the oil drop by drop while continuously beating.
If the mixture becomes too thick, add up to 2 teaspoons of lemon juice or vinegar.
Do not add salt until the mayonnaise is finished to prevent separation.
If the mayonnaise separates, beat it with a Dover egg beater.
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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Lemon + peppertop 3% of all pairsSmell alikestrongCooked together27,047 recipes
Shared aroma: trans-2-nonenal (cardboard, fatty).
-
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).
-
Mustard + peppertop 9% of all pairsSmell alikemoderateCooked together15,430 recipes
Shared aroma: 2-isopropyl-3-methoxypyrazine (earthy, pea).
-
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 yolk
- Emulsifies the oil into the water-based mixture, forming a thick, stable sauce.
- Oil
- Supplies the fat that, dispersed in droplets, gives mayonnaise its rich body.
- Mustard
- Helps hold the oil and water emulsion together, adding stability and flavour.
- Lemon juice or vinegar
- Adds acidity that brightens flavour and can loosen a mixture that has become too thick.
The step that matters
Adding the oil drop by drop while beating. Oil must be dispersed into tiny droplets in the yolk before more is added. Adding it too fast overwhelms the emulsifier, so the mixture breaks and separates instead of thickening.
Swap the mustard
How well each one fits the dish's main ingredients (egg, olive, lemon, pepper):
- Capsicumfits better
- Spinachfits better
- Asparagusfits better
- Mustardthe original
Fit is the average pairing score against egg, olive, lemon, pepper. 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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