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Dessert

Corn-flour Lemon Jelly

A lemon jelly made with cornflour, sugar, water, and lemon zest.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Corn and flour are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 6,165 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Corn-flour Lemon Jelly

Ingredients

Directions

Prepare the base

  1. Rasp the rind of the lemons into the sugar.

  2. Add the strained juice and water, then bring to a boil in an enamelled saucepan.

  3. Mix corn-flour with cold water to a paste, then add to the boiling mixture.

Set and serve

  1. Boil for 1-2 minutes before pouring into a mould.

  2. For a softer jelly, use half the corn-flour and pour into a glass dish.

  3. Garnish with lemon slices and green leaves when serving.

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. Corn + flourtop 13% of all pairs
    Smell alikemoderate
    Cooked together6,165 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Lemon + corntop 13% of all pairs
    Smell alikemoderate
    Cooked together1,927 recipes

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

  3. Sugar + flourtop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  4. Lemon + flourtop 17% of all pairs
    Smell alikemoderate
    Cooked together30,404 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  5. Lemon + sugartop 18% of all pairs
    Smell alikelow
    Cooked together53,532 recipes

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

Lemon and sugar barely smell alike, yet cooks put them together in 53,532 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

Corn-flour
Thickens the lemon liquid into a set jelly as it boils and cools.
Sugar
Sweetens the jelly and balances the sharpness of the lemon juice.
Lemons
Provide the juice and rind that give the jelly its flavour and acidity.

The step that matters

Adding the corn-flour paste to the boiling mixture. Corn-flour must be fully mixed into cold water first so it does not clump, then stirred into boiling liquid, where its starch swells and thickens the jelly. Boiling for the stated 1-2 minutes ensures the starch is fully cooked, which affects the set and removes any raw starch taste.

Swap the lemon

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

  1. Raisinfits better
  2. Vanillafits better
  3. Blueberryfits better
  4. Lemonthe original

Fit is the average pairing score against sugar, corn, flour. 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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