Why it works: Cider and vinegar are a kitchen classic. They rank in the top 6% of all ingredient pairs, and cooks put them together in 3,431 recipes. Both carry 4-ethyl-2-methoxyphenol, which smells smoky, clove. The science ↓
Water-melon Sweet Pickle
Ingredients
Directions
Prepare the rind
Remove the green skin and scrape out the inside of the watermelon rind.
Cut the rind into fancy shapes.
Soak the rind in brine for 2-3 days. If needed, soak longer.
When ready, soak the rind in ice water until fresh, changing the water daily.
Make the pickle
Boil the rind in weak alum-water until it becomes brittle.
Drain the rind from the alum-water.
In a pot, combine cider vinegar, sugar, cinnamon bark, and mace to make a syrup.
Boil the rind in the syrup for 15 minutes.
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.
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Cider + vinegartop 6% of all pairsSmell alikemoderateCooked together3,431 recipes
Shared aroma: 4-ethyl-2-methoxyphenol (smoky, clove).
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Cinnamon + macetop 10% of all pairsSmell alikemoderateCooked together3,611 recipes
Shared aroma: methyleugenol (clove, spice).
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Sugar + cinnamontop 10% of all pairsSmell alikelowCooked together30,779 recipes
Shared aroma: guaiacol (smoky, sweet).
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Vinegar + sugartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
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Cider + cinnamontop 16% of all pairsSmell alikelowCooked together1,497 recipes
Shared aroma: 4-ethyl-2-methoxyphenol (smoky, clove).
Sugar and cinnamon barely smell alike, yet cooks put them together in 30,779 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 main body of the pickle, taking on the flavor of the syrup as it cooks.
- Cider vinegar
- Provides acidity that gives the syrup its tang and helps preserve the pickle.
- Granulated sugar
- Sweetens the syrup and helps preserve the rind while it cooks.
- Cinnamon bark
- Contributes warm aromatic spice flavor to the syrup.
- Mace
- Adds a warm, aromatic spice flavor to the syrup.
- Alum
- Firms the rind so it stays crisp rather than turning soft during cooking.
The step that matters
Boil the rind in weak alum-water until it becomes brittle. Alum firms the pectin in the rind's tissue. Boiling too long or too hard can soften it again, so the rind must be watched closely to stay crisp in the syrup.
Swap the mace
How well each one fits the dish's main ingredients (cider, vinegar, sugar, cinnamon):
- Allspicefits better
- Clovefits better
- Nutmegfits better
- Macethe original
Fit is the average pairing score against cider, vinegar, sugar, cinnamon. 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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