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Peach Jelly

A preserved peach jelly made by boiling peaches with lemon juice and sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Peach and lemon work together. They rank in the top 12% of all ingredient pairs, and cooks put them together in 947 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Peach Jelly

Ingredients

Directions

Prepare the fruit

  1. Crack the kernels and add them to a jar with the cleaned, stoned, and sliced peaches.

  2. Heat the jar in a pot of boiling water, stirring occasionally until the fruit is well broken down.

Make the jelly

  1. Strain the mixture and add the juice of 1 lemon for each pint of peach juice.

  2. Measure the juice again and add 1 pound of sugar for each pint of peach juice.

  3. Heat the sugar until very hot and add it to the juice after it has boiled for 20 minutes.

  4. Let the mixture come to a boil, then remove it from the heat immediately.

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

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

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

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

  3. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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

Peaches
Provide the fruit flavour and the pectin-rich body that sets the jelly.
Sugar
Adds sweetness and helps the juice thicken and set as it cooks.
Lemon juice
Adds acidity that brightens flavour and supports pectin setting.

The step that matters

Adding the hot sugar after 20 minutes of boiling. Sugar added to juice that has already boiled is heated quickly, which helps it dissolve and keeps the jelly from crystallising. Removing the pot from the heat right after boiling prevents over-cooking, which can darken flavour and weaken the set.

Swap the lemon

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

  1. Vanillafits better
  2. Apricotfits better
  3. Pearfits better
  4. Lemonthe original

Fit is the average pairing score against peach, sugar. 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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