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Dessert

Apple Jelly

A sweet preserve made by cooking apples with lemon, sugar, and isinglass until set.

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

Prepare the apples

  1. Pare, core, and quarter the apples.

  2. Place the apples in a saucepan with the lemon rind and just enough water to cover.

  3. Boil until tender.

  4. Mash the apples with their juice.

Make the jelly

  1. Dissolve the isinglass in a little water.

  2. Add the dissolved isinglass to the mashed apples along with the juice of the lemons and the sugar.

  3. Boil the mixture for 30 minutes.

  4. Pour into a mold to set.

Serve

  1. Serve cold, optionally with plain or clotted cream.

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 bulk of the jelly and natural pectin that helps it set.
Isinglass
Gelatine-like protein that sets the liquid into a firm, wobbly jelly when cooled.
Loaf sugar
Adds sweetness and helps give the jelly its glossy, set texture.
Lemons
Add acidity and aroma, and help balance the sweetness of the apples and sugar.

The step that matters

Boil the mixture for 30 minutes. Boiling concentrates the sugar and apple pectin so the jelly can set; the isinglass is added beforehand and gels as it cools, so the mixture must be fully dissolved and evenly mixed before pouring.

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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