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
Combine 1 pound refined sugar and ½ cup spring water in a small copper or brass pan.
Heat over medium heat until the mixture boils, skimming off impurities.
Boil quickly until the sugar reaches the 'Crack' stage; test by dropping a spoonful into cold water—if it hardens, it's ready.
Add the juice of ½ lemon and boil for 1 minute.
Remove the pan from heat and immerse it in a pan of cold water.
Shape and decorate
Grease moulds with sweet oil.
Using a spoon or fork, dip into the caramel and drizzle it over the moulds in fine threads until covered.
Optionally, create a small handle of caramel or attach small gum paste rings for decoration, and place it over small pastries.
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, setting firm and glassy as the syrup cools.
- Lemon juice
- Acidity helps keep the sugar syrup from crystallising, keeping it smooth.
- Spring water
- Dissolves the sugar so it can boil evenly before it caramelises.
The step that matters
Boiling to the Crack stage. Sugar syrup hardens as its water boils off, so stopping too early leaves it sticky and stopping too late makes it bitter and brittle. The cold-water test shows when it has reached the right point.
“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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