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 Sauce
Ingredients
Directions
Make the sauce
Combine lemon juice, water, and sugar in a saucepan and bring to a boil.
Beat the egg yolks lightly, then gradually pour the boiling liquid into them while stirring vigorously.
Return the mixture to the stove and bring to a boil again, stirring continuously.
Pour the sauce into a serving dish and let it cool.
Top and serve
Beat egg whites until stiff peaks form, then gradually add powdered sugar and continue beating until well combined.
Spread the whipped egg whites on top of the cooled sauce and serve.
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.
Photo for illustrative purposes only · Contact us to use it
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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Sugar + eggtop 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
- Yolks thicken the sauce as they cook, and whipped whites form the light topping.
- Sugar
- Sweetens the sauce and balances the sharpness of the lemon juice.
- Lemon juice
- Provides the sharp, acidic flavour that defines the sauce.
- Powdered sugar
- Sweetens the whipped egg whites and helps them hold a stable, glossy texture.
The step that matters
Returning the egg yolk mixture to the heat. Egg yolks thicken when heated, but if the mixture gets too hot or boils too hard, the yolks can scramble and curdle. Stir continuously and watch for the sauce to thicken gently.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, egg):
- Vanillafits better
- Raisinfits about as well
- Lemonthe original
- Datesfits less well
Fit is the average pairing score against sugar, egg. 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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