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 Syrup
Ingredients
Directions
Make the syrup
Boil the water, sugar, and tartaric acid for 10 minutes.
Add the egg white to clarify the mixture.
Boil for an additional 5 minutes.
Finish and bottle
When cold, add the juice of 10 lemons.
Bottle and cork tightly.
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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Sugar + lemontop 18% of all pairsSmell alikelowCooked together53,532 recipes
Shared aroma: 2-nonenal (fatty, green).
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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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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
- Provides sweetness and the bulk of the syrup's body.
- Tartaric acid
- Adds sharpness and helps keep the syrup tart and balanced.
- Egg white
- Binds impurities during boiling so they can be skimmed off, clarifying the syrup.
- Lemon juice
- Supplies the main lemon flavour and additional acidity.
The step that matters
Adding the egg white and boiling. The egg white must be stirred in and then boiled so it coagulates and traps impurities, which rise and can be skimmed away. Boiling too gently may leave the syrup cloudy.
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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