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Preserve

To Preserve Citron

A preserved citron made by simmering sliced fruit with sugar, water, lemon, and ginger.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 ingredients
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Why it works: Lemon and ginger 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 ↓

To Preserve Citron

Ingredients

Directions

Prepare the citron

  1. Pare the citrons and cut them into 1.5‑inch thick slices, then into strips of the same thickness, keeping them the full length of the fruit.

  2. Remove all seeds with a small knife.

  3. Weigh the citron and add an equal weight of white sugar.

Make the syrup and cook

  1. For every 10 pounds of citron, add 1 pint of water and simmer gently for 20 minutes to make a syrup.

  2. Add the citron to the syrup and boil for 1 hour or until tender.

  3. Before removing from heat, add 2 thinly sliced lemons (seeds removed) and 2 ounces of root ginger.

  4. Do not boil long after adding lemon and ginger, and do not stir while boiling.

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. Lemon + gingertop 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

Citrons
Provide the main bulk and the candied, tender peel that becomes the preserve.
White sugar
Sweetens the fruit and, dissolved in water, draws moisture out to preserve it.
Lemons
Add acidity and brightness that balance the sweetness of the syrup.
Root ginger
Adds a warm, aromatic flavour to the preserve.

The step that matters

Limit boiling after adding lemon and ginger, and do not stir. Prolonged boiling breaks down the delicate fruit and can make the syrup over-reduce or turn the citron mushy and cloudy. Stirring while boiling can also break the pieces apart. Keeping the heat gentle and the pieces undisturbed helps them stay whole and translucent.

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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