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 ↓
Lemon Acid
Ingredients
Directions
Make the syrup
Combine the loaf sugar and water in a pot.
Boil the mixture slowly for 30 minutes.
Finish and bottle
Add the citric acid to an earthen pan.
Pour the hot syrup over the citric acid and let it cool.
Once cooled, add the essence of lemon.
Bottle the mixture for use.
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
- Loaf sugar
- Provides sweetness and body, and forms the syrup base.
- Citric acid
- Supplies the sour, tart flavor that gives the syrup its lemon-like bite.
- Essence of lemon
- Adds concentrated lemon aroma to the finished syrup.
The step that matters
Pour the hot syrup over the citric acid and let it cool. Hot syrup dissolves the citric acid evenly into the liquid, so the acid is not left as grainy crystals or pockets of concentrated sourness. Letting it cool before adding the essence protects the volatile lemon aroma from heat loss.
“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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