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Peach Jelly

A fruit preserve made by cooking peaches with sugar and lemon juice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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

Make the juice

  1. In a kettle, combine the sliced peaches and peach kernels with enough water to cover them.

  2. Cook the mixture over medium heat, stirring often, until the fruit is well cooked.

  3. Strain the mixture to extract the juice.

Make the jelly

  1. For every pint of juice, add the juice of one lemon.

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

  3. Heat the sugar until very hot, then add it to the juice after it has boiled for twenty minutes.

  4. Bring the mixture 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 main fruit flavor and the pectin-rich body that gives the jelly its structure.
Peach kernels
Add a subtle almond-like aroma to the peach flavor.
Lemon juice
Adds acidity that brightens flavor and helps the jelly set.
Sugar
Adds sweetness and, with the cooked fruit, helps the juice thicken and set as a jelly.

The step that matters

Adding the hot sugar and boiling. Sugar must dissolve fully and the mixture must reach a rolling boil to concentrate and set properly. Removing it from the heat immediately after boiling prevents overcooking, which can make the jelly stiff or cause the sugar to crystallize or darken.

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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