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Dessert

Peach Jelly

A gelatinous dessert made from peaches, lemon juice, and isinglass, set in a mold and topped with reserved peach halves.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 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 peaches

  1. Cut the peaches in half, remove the stones and peel them.

Make the syrup

  1. In a pot, combine the sugar with enough water to dissolve it and bring to a boil.

  2. Once boiling, skim the surface and add the peaches and broken kernels.

  3. Boil gently for 10 minutes, then remove 4-5 peach halves and set aside on a plate.

  4. Continue boiling the remaining peaches for another 10 minutes.

Add the lemon and isinglass

  1. While boiling, peel the lemons and squeeze the juice through a silk sieve into a bowl.

  2. Add the peach liquid to the lemon juice, then mix in the isinglass, straining it through the sieve 2-3 times.

Mold and set

  1. Fill a mold halfway with the jelly mixture, let it set, then add the reserved peach halves.

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. Sugar + lemontop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

Sugar and lemon 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 soft body to the jelly.
Sugar
Adds sweetness and helps the jelly hold its set and clear texture.
Lemons
Add acidity that brightens the peach flavor and balances the sweetness.
Isinglass
A gelling agent that sets the liquid into a firm jelly as it cools.
Peach kernels
Add a subtle almond-like aroma to the peach flavor.

The step that matters

Straining the jelly mixture. Isinglass sets as it cools, so it must be fully dissolved and mixed in. Straining 2-3 times removes solids and cloudiness, giving a clear jelly that sets evenly.

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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