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 ↓
Citron Preserve
Ingredients
Directions
Prepare the citron
Soak the citron pieces in salt water overnight.
Drain the citron and boil in water until soft enough to pierce with a broom splint.
Make the preserve
Make a syrup with 1 pound of sugar for every pound of fruit.
Add 1 lemon for every 2 pounds of fruit.
Boil all together until thick.
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
- Citron
- Provides the bulk of the preserve and, once softened, its tender, chewy texture.
- Sugar
- Sweetens the preserve and draws water out of the fruit, helping it thicken into a syrup.
- Lemon
- Adds acidity to balance the sweetness and helps the preserve set.
The step that matters
Boil all together until thick. Sugar draws water out of the fruit, and the mixture thickens as water evaporates and natural pectin from the fruit and lemon helps it set. Stop too early and it stays runny; boil too long and the sugar can scorch.
“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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