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Apple Jelly for Cake

A sweet apple jelly made by boiling grated apples with lemon juice and sugar.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 3 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 for Cake

Ingredients

Directions

Prepare

  1. Grate the apples and add the lemon juice and rind.

Cook

  1. Stir in the sugar and bring to a boil.

  2. Boil for three minutes.

Finish

  1. Remove from heat and let cool before using.

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. Lemon + sugartop 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 body, which help the mixture thicken and set as it cools.
Lemon
Adds acidity that helps the pectin set and brightens the flavour.
Sugar
Adds sweetness and helps thicken the mixture and preserve it.

The step that matters

Let it cool before using. The jelly thickens as it cools, because pectin from the apples forms a gel network once the temperature drops. Using it while still hot will give a runny result that has not yet set.

Flavor stand-ins for the lemon

How well each one fits the dish's main ingredients (apple, sugar):

  1. Pearbetter flavor fit
  2. Vanillabetter flavor fit
  3. Apricotbetter flavor fit
  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. This compares flavor only: it does not check the job the ingredient does in the dish (bulk, moisture, acidity, structure).

“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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