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Exceedingly Fine Apple Jelly

A sweet preserve made from apples, sugar, and lemon juice, boiled into a thick jelly.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Apple and lemon are a kitchen classic. They rank in the top 14% of all ingredient pairs, and cooks put them together in 7,551 recipes. Both carry trans-2-nonenal, which smells cardboard, fatty. The science ↓

Exceedingly Fine Apple Jelly

Ingredients

Directions

Prepare the apples

  1. Pare and slice the apples, removing stalks and seeds, and place them in clean large stone jars, dipping layers in cold water to preserve color.

  2. Set the jars in pans of water and boil the apples slowly until soft.

  3. Turn the cooked apples into a jelly bag or cloth and let the juice drain completely.

Make the jelly

  1. Weigh the juice and boil it for 10 minutes.

  2. Stir in 12 oz of sugar for every quart of juice until dissolved.

  3. Return the mixture to the heat, stirring continuously and skimming off any scum, and boil for an additional 8 to 10 minutes.

  4. Add the juice of 2 small lemons and simmer the lemon rind in the juice before adding sugar, if desired.

  5. Pour the jelly into molds and let it set.

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. Apple + lemontop 14% of all pairs
    Smell alikemoderate
    Cooked together7,551 recipes

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

  2. Apple + sugartop 18% of all pairs
    Smell alikelow
    Cooked together16,478 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).

Apple and sugar barely smell alike, yet cooks put them together in 16,478 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

Apples
Provide the pectin and body that let the juice set into a firm jelly.
Sugar
Sweetens and helps the jelly set firm and hold its shape.
Lemon juice
Adds acidity that brightens flavor and supports proper gel setting.

The step that matters

Boil the juice with sugar until it sets. Sugar and acid must be boiled to the right concentration for the pectin in the juice to gel. Undercooking leaves a runny jelly, while overcooking can make it stiff or cloudy.

Swap the lemon

The recipe marks lemon as optional. How well each one fits the dish's main ingredients (apple, sugar):

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

Fit is the average pairing score against apple, 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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