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 Jelly
Ingredients
Directions
Prepare
Squeeze the juice from the lemons.
Place the lemon rinds in a saucepan over low heat with the isinglass and boiling water.
Stir until the isinglass is dissolved.
Make and set the jelly
Add the lemon juice and sweeten with loaf sugar to taste.
Boil for a moment, then color as desired.
Strain through a jelly bag without pressing.
Pour into glasses and seal.
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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Lemon + sugartop 18% of all pairsSmell alikelowCooked together53,532 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
- Isinglass
- Sets the liquid into a firm jelly as it cools.
- Lemons
- Provide the juice for sharp acidity and the rinds for aroma.
- Loaf sugar
- Adds sweetness to balance the lemon's acidity.
The step that matters
Stir until the isinglass is dissolved. Isinglass must fully dissolve in the hot liquid before cooling; undissolved granules leave gritty specks and uneven setting in the finished jelly.
“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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