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 ↓
To Boil Sugar to Caramel
Ingredients
Directions
Make the caramel
In a small copper or brass pan, combine 1 pound of refined sugar and ½ cup of spring water.
Place the pan over heat and bring to a boil, 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 juice of ½ lemon and boil for 1 more minute.
Set the pan in a larger bowl of cold water to cool.
Shape and decorate
Grease your moulds with sweet oil.
Using a spoon or fork, dip into the sugar and drizzle it over the moulds in fine threads until covered.
Optionally, create a small handle from caramel or attach small gum paste rings for decoration.
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 structure and sweetness; boiling it to the crack stage sets it hard when cooled.
- Spring water
- Dissolves the sugar so it can boil evenly without crystallising too early.
- Lemon juice
- Adds acidity that helps prevent the sugar from crystallising, keeping the caramel smooth.
The step that matters
Boiling to the crack stage. Sugar syrup must reach the right temperature to set hard when cooled. Stopping early leaves it sticky, while overcooking can scorch it and give a bitter taste. Testing a spoonful in cold water shows when it hardens.
“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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