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 Water Ice
Ingredients
Directions
Make the syrup
Cut the rind of the lemons very thin.
Put the rind, water, and sugar into a saucepan.
Stir until boiling, then boil quickly for 8 to 10 minutes, skimming well without stirring.
Finish and freeze
Strain into a basin and add the lemon juice.
Let it cool, then freeze.
When nearly frozen, stir in the beaten egg whites until very stiff.
Continue to freeze until very firm.
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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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
- Sugar
- Sweetens the ice and lowers its freezing point, keeping it softer and scoopable.
- Lemon juice
- Adds sharp acidity that balances the sweetness and gives the ice its flavour.
- Egg whites
- Whipped in, they trap air and give the frozen ice a lighter, stiffer texture.
- Lemon rind
- Infuses the syrup with aromatic lemon oils during boiling.
The step that matters
Skimming without stirring during the boil. Stirring while the syrup boils can introduce air and cloud the mixture, and skimming removes impurities that would spoil clarity and flavour. Boiling quickly for the stated time concentrates the syrup so the ice freezes with the intended texture.
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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