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Dessert

Preserved Watermelon

Preserved watermelon rind soaked, boiled, and flavored with lemon, ginger, and sugar syrup.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 9 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 ↓

Preserved Watermelon

Ingredients

Directions

Prepare the rind

  1. Cut the thick rind of a ripe watermelon into small strips, removing all the red part and scraping the outside.

  2. Boil the rind with 12 peach leaves and 1 teaspoon of saleratus in 2 quarts of water until tender.

  3. Remove the rind and soak it in cold water with ½ tablespoon of dissolved alum for 1 hour.

  4. Rinse the rind in clear water.

Make the syrup

  1. Boil the rind for 15-20 minutes in a syrup made of equal parts sugar and water, adding 1 lemon cut into small pieces.

  2. Add a little extract of ginger.

  3. Let the mixture stand for 3 days.

  4. Pour off the syrup.

  5. Boil the syrup until very rich.

Finish and serve

  1. Cover the rinds with the syrup.

  2. Pour the syrup over the rinds while still 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. Peach + gingertop 8% of all pairs
    Smell alikemoderate
    Cooked together218 recipes

    Shared aroma: 1-octen-3-one (mushroom, metallic).

  3. Peach + lemontop 12% of all pairs
    Smell alikemoderate
    Cooked together947 recipes

    Shared aroma: trans-2-nonenal (cardboard, fatty).

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

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

  5. Peach + sugartop 17% of all pairs
    Smell alikelow
    Cooked together2,308 recipes

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

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 rind
Forms the firm, crisp base that the syrup penetrates and sweetens.
Sugar
Preserves the rind and builds the sweetness and thick texture of the syrup.
Alum
Firms the rind's texture so it stays crisp after long cooking.
Lemon
Adds acidity that brightens the sweet syrup and helps balance it.

The step that matters

Soaking in alum water. Alum firms the rind's cell structure so it stays crisp rather than turning soft and mushy. Measure it carefully, since too much can leave a harsh, astringent taste.

Swap the peach

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

  1. Orangefits better
  2. Limefits better
  3. Mangofits about as well
  4. Peachthe original

Fit is the average pairing score against sugar, lemon, 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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