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 ↓
Isinglass Jelly, Lemon
Ingredients
Directions
Prepare
Peel the rind of the lemons, avoiding the white inner skin.
In a saucepan, combine the isinglass and water, and heat until clarified.
Sweeten the mixture with loaf sugar to taste.
Set the jelly
Strain the juice of the lemons and gently pour it into the cooled isinglass mixture.
Remove the lemon rind and pour the mixture into small molds or one large mold.
Cover the molds with crushed ice and let set.
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).
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
- Isinglass
- Gelling agent that sets the liquid into a firm, tender jelly as it cools.
- Lemon juice
- Provides sharp acidity that balances the sugar and gives the jelly its bright flavour.
- Loaf sugar
- Sweetens the jelly and offsets the sourness of the lemon juice.
- Lemon rind
- Adds aromatic citrus oils that scent the jelly without adding much sourness.
The step that matters
Pour the lemon juice into the cooled isinglass mixture. If the isinglass mixture is still hot, it can weaken its gelling ability and the added juice may cloud the jelly. Letting it cool first helps it set clear and firm.
“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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