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Dessert

Apple Jelly

A fruit preserve made from apples, water, sugar, optional lemon peel, and gelatin, boiled and strained into molds.

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

Cook the apples

  1. Peel and core the apples.

  2. Place the apples in a pot with the water and lemon peel.

  3. Boil the mixture until it is reduced to 2 quarts.

Sweeten and set

  1. Sweeten the mixture to taste.

  2. Soak the gelatin in cold water for 10 minutes.

  3. Add the soaked gelatin to the jelly.

  4. Boil the mixture for 10 minutes.

Strain and mould

  1. Strain the mixture through a jelly bag.

  2. Leave the strained mixture until it is nearly cold.

  3. Pour the mixture into molds.

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 acidity, which give the jelly body and help it set.
Gelatine
Sets the liquid into a firm, wobbly jelly as it cools.
Sugar
Adds sweetness and helps balance the tartness of the apples.

The step that matters

Reducing the apple liquid to 2 quarts. Boiling down the liquid concentrates the natural pectin and flavour of the apples. If it is under-reduced, the jelly may be weak and slow to set; if over-reduced, it can become too stiff and taste overly intense.

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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