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Preserve

Orange Citron

Preserved orange peel soaked in salt, rinsed, and boiled in a sugar syrup.

From an old cookbook · modernised transcription
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Why it works: Orange and sugar are a kitchen classic. They rank in the top 20% of all ingredient pairs, and cooks put them together in 19,212 recipes. Both carry beta-damascenone, which smells apple, rose. The science ↓

Orange Citron

Ingredients

Directions

The book gives no cooking times; the times in the steps were added in transcription, so check for doneness rather than trusting the clock.

Prepare the peel

  1. Soak the orange peel in salt and water for 24 hours.

  2. Rinse the peel in fresh water for another 24 hours.

Make the syrup

  1. Make a syrup with equal parts sugar and orange peel by weight.

  2. Boil the syrup until it becomes nearly transparent.

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. Orange + sugartop 20% of all pairs
    Smell alikelow
    Cooked together19,212 recipes

    Shared aroma: beta-damascenone (apple, rose).

Orange and sugar barely smell alike, yet cooks put them together in 19,212 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

Thick orange peel
Forms the candied citrus itself, supplying the flavour and the chewy texture once cooked in syrup.
Sugar
Sweetens the peel and, dissolved into syrup, preserves it and gives it a glossy finish.

The step that matters

Boiling the syrup until nearly transparent. Sugar concentration and temperature decide how well the peel candies. Boiling too briefly leaves it wet and loose, while overheating can turn the sugar bitter or hard. Stopping when the syrup looks nearly clear is a visual cue that the sugar has reached a workable concentration.

“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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