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Dessert

Watermel Preserves

A method for preserving watermelon by salting, boiling with alum, and making sugar syrups.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 ingredients
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Why it works: Sugar and syrup match in chemistry and in kitchens. They rank in the top 6% of all ingredient pairs, and cooks put them together in 5,842 recipes. Both carry ethanol, which smells alcoholic, ethereal. The science ↓

Watermel Preserves

Ingredients

Directions

Prepare the watermelon

  1. Soak the watermelon in saltwater for one week, changing to clear water for the last three days.

  2. Boil the watermelon in alum water, covering it thickly with grape leaves until it turns perfectly green.

  3. Transfer the watermelon to clear cold water, changing the water daily.

Make the syrup

  1. Make a thin syrup with ½ pound of sugar for every pound of watermelon and boil until nearly done.

  2. Prepare a rich syrup with 1 pound of sugar for every pound of watermelon and boil until transparent.

  3. Strain the strong ginger tea and wet the sugar with it.

  4. Season the mixture with mace to taste.

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 + syruptop 6% of all pairs
    Smell alikestrong
    Cooked together5,842 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  2. Ginger + teatop 7% of all pairs
    Smell alikemoderate
    Cooked together216 recipes

    Shared aroma: (e)-2-octenal (fatty, green).

  3. Ginger + macetop 11% of all pairs
    Smell alikelow
    Cooked together2,152 recipes

    Shared aroma: alpha-pinene (pine, turpentine).

  4. Syrup + gingertop 16% of all pairs
    Smell alikelow
    Cooked together950 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

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

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

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

Watermelon
The main fruit, whose flesh becomes translucent as it absorbs the sugar syrup.
Alum
Firms the fruit's tissue so it stays intact through long boiling and soaking.
Sugar
Sweetens the fruit and, in concentrated syrup, helps preserve it.
Strong ginger tea
Adds a warm, spicy aroma and flavour to the syrup.

The step that matters

Boil the watermelon in alum water until it turns green. Alum strengthens the fruit's cell walls so it stays firm. Boiling too long softens the watermelon, and it then breaks down in the later syrup stages.

Swap the mace

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

  1. Cinnamonfits better
  2. Cardamomfits better
  3. Clovefits better
  4. Macethe original

Fit is the average pairing score against sugar, syrup, ginger, tea. 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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