Why it works: Sugar and lemon 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 syrup
Combine sugar, lemon rind, lemon juice, and water in a saucepan.
Boil the mixture for 20 minutes.
Finish the sauce
Beat the egg yolks in a separate bowl.
Place the saucepan with the syrup into a larger bowl of boiling water.
Stir the egg yolks into the syrup and beat rapidly for 3 minutes.
Remove from heat and continue beating for 5 minutes.
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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Sugar + lemontop 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).
Sugar and lemon 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
- Sugar
- Sweetens the sauce and thickens the syrup as it boils down.
- Egg yolks
- Thicken the sauce as they cook gently, giving it a smooth, creamy body.
- Lemon juice
- Adds acidity and bright flavour that balances the sweetness.
- Lemon rind
- Adds aromatic lemon oils that flavour the syrup.
The step that matters
Stir the egg yolks into the syrup and beat rapidly. Egg yolks scramble if they meet hot syrup too quickly or sit still. Beating rapidly while adding them spreads the heat evenly, so the sauce thickens smoothly instead of curdling.
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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