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 ↓
Barley Sugar Drops
Ingredients
Directions
Make the drops
Clarify the sugar.
Boil the sugar until it becomes crisp when dipped in cold water, adding the thinly pared rind of the lemons while boiling.
Drop the sugar onto a stone or marble slab in round drops.
Finish and store
Once cool, roll the drops in sifted loaf sugar.
Store them between layers of white paper or wrap in small squares of paper, twisting the ends.
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
- Sugar
- Forms the glassy, brittle candy structure when boiled to the hard-crack stage.
- Lemon rind
- Adds aromatic lemon flavour that infuses the sugar while it boils.
- Sifted loaf sugar
- Coats the cooled drops, giving a dry, non-sticky surface.
The step that matters
Boiling the sugar to the crisp stage. Sugar must reach the hard-crack stage so the drops set brittle rather than sticky. Undercooked sugar stays soft and tacky, while overcooked sugar can darken and taste bitter.
“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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