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 Ice
Ingredients
Directions
Make the syrup
Roll the lemons until well bruised and squeeze out the juice.
Add enough white sugar to make a thick syrup and mix in 1 pint of cold water.
Bring the mixture to a boil, then set aside to cool.
Add more water to create a strong lemonade flavor.
Freeze
Pour the mixture into a freezer.
When nearly frozen, add the beaten egg whites and stir well.
Freeze until 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).
-
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
- Lemons
- Provide the juice and tart flavor that defines the ice.
- White sugar
- Sweetens the lemon juice and makes a syrup that keeps the ice from freezing rock hard.
- Egg whites
- Whipped into the nearly frozen mixture to add lightness and a smoother, airier texture.
The step that matters
Add the egg whites when nearly frozen. If the mixture is fully frozen, the beaten egg whites cannot blend in evenly, so the ice ends up dense and uneven instead of light and smooth.
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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