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Dessert

Lemon Syrup

A clear lemon-flavored syrup made by boiling sugar and water, adding powdered citric acid and lemon essence.

From an old cookbook · modernised transcription
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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 Syrup

Ingredients

Directions

Make the syrup

  1. Boil the water and sugar together.

  2. Pour the mixture into a basin to cool.

Flavour and bottle

  1. Beat the citric acid to a powder.

  2. Mix the essence of lemon with the powdered acid.

  3. Add the mixture to the syrup and mix well.

  4. Bottle the syrup.

Recipe from a historical cookbook (Internet Archive).

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.

  1. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked 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 the sweetness and body of the syrup.
Citric acid
Adds a sharp sourness that balances the sweetness.
Essence of lemon
Supplies the lemon aroma and flavour.

The step that matters

Add the mixture to the syrup and mix well. Citric acid is a powder that can clump or settle. Mixing thoroughly disperses it evenly, so every bottle tastes equally sour rather than having pockets of strong acidity.

“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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