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Dessert

To Preserve Watermelon Rinds

A method for preserving watermelon rinds by soaking, boiling, and seasoning with salt, sugar, ginger, mace, and lemon oil.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 8 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 ↓

To Preserve Watermelon Rinds

Ingredients

Directions

Soak and firm

  1. Soak the watermelon rinds in salt water for 3 days.

  2. Soak in fresh water for another 3 days.

  3. Boil the rinds in alum water.

  4. Soak in fresh water overnight, changing the water several times.

Flavor and sweeten

  1. Boil in ginger water.

  2. For every pound of fruit, add 1 ¼ pounds of sugar, ginger, and mace.

  3. Flavor with oil of lemon.

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

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

  3. Ginger + sugartop 17% of all pairs
    Smell alikelow
    Cooked together14,054 recipes

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

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

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

  5. Mace + lemontop 18% of all pairs
    Smell alikemoderate
    Cooked together6,315 recipes

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

Ginger and sugar 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 rinds
Forms the crisp, mild base that absorbs the syrup and flavorings.
Alum
Firms the rind's tissue so it stays crisp rather than turning soft during boiling.
Sugar
Sweetens the rinds and, in a concentrated syrup, helps preserve them.
Ginger
Adds a warm, spicy aroma that balances the sweetness.

The step that matters

Boiling in alum water. Alum strengthens pectin cross-links in the rind, which keeps it firm. Boiling too long or using too much can make the rind hard or gritty, while too little leaves it soft.

Swap the mace

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

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

Fit is the average pairing score against ginger, sugar, lemon. 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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