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Dessert

Citron Preserves

Citron preserves are made by cooking citron, sugar, ginger, and thinly sliced lemons until the fruit becomes translucent and the syrup thickens.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Ginger and lemon match in chemistry and in kitchens. They rank in the top 5% of all ingredient pairs, and cooks put them together in 5,154 recipes. Both carry beta-phellandrene, which smells minty, terpene. The science ↓

Citron Preserves

Ingredients

Directions

  1. Combine citron and sugar in a large pot.

  2. Add whole ginger and thinly sliced lemons.

  3. Cook over medium heat until the citron looks transparent.

  4. If the syrup is too thin, continue cooking until it thickens.

  5. Pour the syrup over the fruit and store it.

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. Ginger + lemontop 5% of all pairs
    Smell alikestrong
    Cooked together5,154 recipes

    Shared aroma: beta-phellandrene (minty, terpene).

  2. Sugar + gingertop 17% of all pairs
    Smell alikelow
    Cooked together14,054 recipes

    Shared aroma: 1-penten-3-one (fish, pungent).

  3. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

    Shared aroma: 2-nonenal (fatty, green).

Sugar and ginger barely smell alike, yet cooks put them together in 14,054 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 main fruit body and bulk of the preserve, softening and turning translucent as it cooks.
Sugar
Sweetens the preserve and, as it dissolves into syrup, draws out moisture and helps preserve the fruit.
Lemons
Adds acidity and bright flavour that balances the sweetness of the syrup.
Whole ginger
Adds aromatic, warm spice flavour to the syrup and fruit.

The step that matters

Cooking until the syrup thickens. Sugar syrup thickens as water evaporates and sugar concentration rises. If it is too thin, the preserve may not set and can spoil more readily. Cooking must continue until the syrup is thick enough.

Swap the lemon

How well each one fits the dish's main ingredients (sugar, ginger):

  1. Lemonthe original
  2. Orangefits about as well
  3. Limefits less well
  4. Vanillafits less well

Fit is the average pairing score against sugar, ginger. Candidates are from the same food group and used in at least 100 recipes.

“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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