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Dessert

Crab Apple Jelly

A jelly made from crab apples, water, sugar, and optional lemon.

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 ↓

Crab Apple Jelly

Ingredients

Directions

Prepare the fruit

  1. Wash the crab apples thoroughly without peeling or coring them.

  2. Halve or quarter the crab apples.

  3. Place the halved or quartered apples in a pan with enough water to cover them.

Extract the juice

  1. Cook the apples until they turn to a pulp.

  2. Transfer the cooked apples to a jelly bag and let drain overnight.

  3. Measure the juice in the morning.

Make the jelly

  1. Add 1 pound of sugar for every pint of juice.

  2. Boil the mixture until it is clear and a bright rosy red.

  3. Test for readiness by dropping a little on a plate.

  4. If it stiffens, remove from heat.

  5. Pour the jelly into molds or pots.

  6. Add lemon juice or essence of lemon if desired.

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. Crab + lemontop 16% of all pairs
    Smell alikemoderate
    Cooked together387 recipes

    Shared aroma: 1-octen-3-ol (mushroom, earthy).

  3. Apple + sugartop 18% of all pairs
    Smell alikelow
    Cooked together16,478 recipes

    Shared aroma: beta-damascenone (apple, rose).

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

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

  5. Crab + sugartop 19% of all pairs
    Smell alikemoderate
    Cooked together407 recipes

    Shared aroma: hexanal (grass, 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

Crab apples
Supply the natural pectin and acid that allow the juice to set into jelly.
Sugar
Sweetens the jelly and, with pectin and acid, helps it set firm.

The step that matters

Judging when the jelly has reached setting point. Pectin sets only when sugar and acid are concentrated enough by boiling. Stopping too early leaves the jelly runny, while boiling too long can dull its colour and flavour and make it stiff. The plate test shows whether it is ready.

Swap the lemon

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

  1. Pearfits better
  2. Quincefits better
  3. Plumfits better
  4. Lemonthe original

Fit is the average pairing score against crab, 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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