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 ↓
Caramel, or Boiled Sugar
Ingredients
Directions
Make the caramel
In a small copper or brass pan, combine the sugar and spring water.
Heat the mixture until it boils, skimming off any impurities.
Boil quickly until it reaches the 'Crack' stage, tested by dropping a spoonful into cold water; it should harden.
Add the lemon juice and boil for one more minute.
Place the pan in another container of cold water.
Shape
Grease moulds with sweet oil.
Dip a spoon into the sugar and drizzle it over the moulds in thin threads until covered.
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
- Refined sugar
- Forms the caramel itself and sets firm as the syrup cools and hardens.
- Lemon juice
- Adds acidity that helps prevent the sugar from crystallising during boiling.
The step that matters
Boiling to the Crack stage. Sugar syrup must reach the right concentration and temperature to harden when cooled. Stopping too early leaves it sticky, while overcooking causes bitterness and browning. Testing a drop in cold water shows when it has reached the target stage.
“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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