Why it works: Sugar and gelatin are a kitchen classic. They rank in the top 7% of all ingredient pairs, and cooks put them together in 2,778 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓
Lemon Cream
Ingredients
Directions
Prepare the base
Cut the rind of one lemon very thin and place it in a saucepan.
Add 1½ cups sugar and pour 1 cup boiling water over it.
Soften 1 oz. gelatin in a little cold water, then add it to the hot mixture and stir until dissolved.
Make the custard
Remove from heat and mix in 3 well-beaten eggs and the juice of 3 lemons.
Cook over boiling water for 20 to 30 minutes until thickened.
Set
Pour into a wet mold and set in a cool place 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.
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 + gelatintop 7% of all pairsSmell alikemoderateCooked together2,778 recipes
Shared aroma: ethanol (alcoholic, ethereal).
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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).
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Lemon + gelatintop 27% of all pairsSmell alikelowCooked together1,215 recipes
Shared aroma: beta-pinene (pine, resin).
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
- Thicken the mixture as they cook and help give the cream its body.
- Gelatin
- Sets the liquid so the cream holds its shape when cooled.
- Sugar
- Sweetens the cream and balances the sharpness of the lemon juice.
- Lemon juice
- Adds acidity and bright lemon flavor to the cream.
The step that matters
Cooking the custard over boiling water. Eggs thicken as their proteins set with gentle heat. Too much heat or too long cooking can curdle them, leaving a grainy texture instead of a smooth cream.
Swap the lemon
How well each one fits the dish's main ingredients (sugar, gelatin, egg):
- Vanillafits better
- Raisinfits better
- Figfits about as well
- Lemonthe original
Fit is the average pairing score against sugar, gelatin, 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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