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 lemon base
Juice the lemon and add it to the boiling water.
Stir in the cornstarch until dissolved.
Make the egg mixture
In a separate bowl, wet the beaten egg yolks with a little water.
Add the sugar to the egg yolks and mix well.
Combine and thicken
Combine the egg mixture with the boiling lemon mixture and boil for a few minutes until thickened.
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
- Egg yolks
- Provide richness and help set the cream as they thicken with heat.
- Cornstarch
- Thickens the liquid as its starch swells and sets when boiled.
- Lemon juice
- Adds the sharp acidity and bright flavor that defines the cream.
- Sugar
- Adds sweetness that balances the tartness of the lemon.
The step that matters
Combining the egg mixture with the boiling lemon mixture. Stir constantly as you add the eggs so they blend smoothly instead of scrambling. Cornstarch only thickens fully once the mixture reaches a boil, so keep it boiling until it visibly thickens.
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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