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Dessert

Apple Jelly

Apple jelly is a fruit preserve made from apples, water, sugar, and lemon juice.

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 ↓

Apple Jelly

Ingredients

Directions

Prepare the apples

  1. Pare, core, and quarter the apples quickly to prevent discoloration.

  2. In a pot, combine the apples with cold water and boil until well broken but not a thick pulp.

Extract the juice

  1. Drain the mixture through a fine sieve or muslin strainer, then through a jelly bag until the juice is clear.

  2. Weigh the juice and boil it quickly for 20 minutes to reduce it.

Make the jelly

  1. Add 4 lbs of finely broken sugar to the juice and stir until dissolved.

  2. Return the mixture to the heat and boil for 10 minutes until it jellies on a skimmer.

  3. Add the strained juice of 3 lemons a couple of minutes before removing from heat.

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 pectin and acid that let the juice set into a firm jelly.
Sugar
Adds sweetness and helps the juice gel when boiled to the setting point.
Lemons
Add acidity that brightens flavour and supports pectin setting.

The step that matters

Boiling to the setting point. Boiling until the jelly wrinkles on a cold skimmer shows the sugar and pectin have reached the concentration needed to set. Too little boiling leaves it runny, while overboiling can make it stiff and dull.

Swap the lemon

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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