Why it works: Lemon and sugar are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓
Lemon Cream
Ingredients
Directions
Make the custard
Heat the lemon juice, lemon rind, and water in a saucepan.
Stir in the cornstarch until dissolved.
Add the beaten egg yolks and sugar, mixing well.
Cook on the stove until thickened like custard.
Finish and serve
Once cool, fold in the beaten egg whites gently.
Transfer to a high glass dish and serve with or without meringue.
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 + sugartop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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Lemon + eggtop 19% of all pairsSmell alikelowCooked together44,316 recipes
Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).
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Egg + sugartop 21% of all pairsSmell alikemoderateCooked together122,807 recipes
Shared aroma: 2-nonenal (fatty, green).
Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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 yolks thicken the custard, and whipped whites lighten the finished cream.
- Cornstarch
- Starch thickens the liquid as it heats, giving the cream body.
- Sugar
- Sweetens the cream and balances the sharpness of the lemon.
- Lemons
- Juice gives the cream its sour flavour, and rind adds aroma.
The step that matters
Cook on the stove until thickened like custard. Egg yolks set and cornstarch gelatinises only when heated enough, so the cream thickens. Undercooked mixtures stay thin, while overheating can curdle the yolks.
Swap the lemon
How well each one fits the dish's main ingredients (egg, sugar):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against egg, sugar. 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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