Why it works: Mustard and horseradish match in chemistry and in kitchens. They rank in the top 1% of all ingredient pairs, and cooks put them together in 1,832 recipes. Both carry coumarin, which smells sweet, hay. The science ↓
Pickled Peaches
Ingredients
Directions
Prepare the peaches
Remove the pits from the peaches.
Fill the peaches with a mixture of large and small mustard seeds and grated horseradish.
Tie the peaches closed with thread.
Make the syrup and pickle
Prepare a hot syrup by combining 1 pound of brown sugar with 1 quart of vinegar.
Pour the hot syrup over the filled peaches.
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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Mustard + horseradishtop 1% of all pairsSmell alikestrongCooked together1,832 recipes
Shared aroma: coumarin (sweet, hay).
-
Mustard + vinegartop 7% of all pairsSmell alikemoderateCooked together14,067 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Horseradish + vinegartop 12% of all pairsSmell alikemoderateCooked together2,609 recipes
Shared aroma: isobutyraldehyde (malty, green).
-
Peach + mustardtop 15% of all pairsSmell alikestrongCooked together138 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
-
Sugar + vinegartop 15% of all pairsSmell alikemoderateCooked together20,806 recipes
Shared aroma: beta-damascenone (apple, rose).
Ranks compare each pair with 20,000 random ingredient pairs on CompKitchen. How we score pairs
What each ingredient does
- Free-stone peaches
- Provide the fruit that softens and absorbs the sweet-sour syrup while holding the filling.
- Brown sugar
- Adds sweetness and depth, balancing the sharpness of the vinegar.
- Vinegar
- Provides acidity that preserves the fruit and gives the pickle its tang.
- Large and small mustard seeds
- Add a sharp, pungent flavour that infuses the peach flesh as it pickles.
- Grated horseradish
- Contributes a sharp, pungent heat that mellows during pickling.
The step that matters
Pour the hot syrup over the filled peaches. The syrup must be hot enough to dissolve the sugar fully and to help the fruit take up the vinegar and spices. Cold syrup would pickle the peaches unevenly and slow flavour penetration.
Swap the peach
How well each one fits the dish's main ingredients (mustard, horseradish, sugar, vinegar):
- Avocadofits better
- Limefits better
- Lemonfits better
- Peachthe original
Fit is the average pairing score against mustard, horseradish, sugar, vinegar. 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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