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 ↓
New Way to Make Mayonnaise
Ingredients
Directions
Make the mayonnaise
Place the whole egg in a bowl.
Beat in the oil gradually.
Add lemon juice, salt, and pepper to taste.
Add 1 tablespoon of boiling water for each cup of mayonnaise and beat until combined.
Cool and store
Cool the mayonnaise.
Place it on ice to prevent separation.
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).
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Olive + lemontop 7% of all pairsSmell alikemoderateCooked together11,922 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Olive + peppertop 11% of all pairsSmell alikemoderateCooked together30,263 recipes
Shared aroma: 2,4-decadienal (seaweed).
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Egg + lemontop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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Egg + olivetop 31% of all pairsSmell alikemoderateCooked together15,340 recipes
Shared aroma: 2,4-decadienal (seaweed).
Egg and lemon barely smell alike, yet cooks put them together in 44,316 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
- Whole egg
- Its proteins emulsify the oil and water into a stable, thick sauce.
- Oil
- Forms the bulk of the emulsion, giving mayonnaise its richness and body.
- Lemon juice
- Adds acidity that brightens flavour and helps balance the richness of the oil.
The step that matters
Beat the oil in gradually. Adding oil slowly lets the egg proteins coat each droplet before more is added. Pouring too fast overwhelms the egg, so the emulsion breaks and the sauce stays runny or separates.
“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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