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Dessert

Lemon Jelly Tarts

A tart filled with lemon-flavored jelly made from lemon rind, pulp, sugar, egg, flour, and water.

From an old cookbook · modernised transcription
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Why it works: Sugar and flour are a kitchen classic. They rank in the top 15% of all ingredient pairs, and cooks put them together in 92,116 recipes. Both carry phenylacetaldehyde, which smells hawthorne, honey. The science ↓

Lemon Jelly Tarts

Ingredients

Directions

Prepare the crusts

  1. Line pans with good pie crust and bake.

Make the lemon jelly

  1. In a bowl, mix the lemon rind and pulp, sugar, egg, and flour.

  2. Gradually add boiling water while stirring continuously.

  3. Place the mixture in a double boiler and cook, stirring constantly.

  4. Pour the hot jelly into the baked crusts and let cool.

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

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  2. Egg + flourtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

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

    Shared aroma: isobutyraldehyde (malty, green).

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

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

  5. Lemon + eggtop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

    Shared aroma: (e,e)-2,4-decadienal (fatty, deep fried).

Egg and flour barely smell alike, yet cooks put them together in 106,462 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

Egg
Thickens the filling as it cooks and helps it set into a jelly.
Flour
Stabilises the filling and adds body so it sets firmly rather than runny.
Sugar
Sweetens the filling and balances the sharpness of the lemon.
Lemon
Provides the main flavour and acidity, with rind adding aromatic oils.

The step that matters

Cooking the jelly over a double boiler. Stirring constantly over gentle, indirect heat keeps the egg from scrambling and the flour from clumping, so the filling thickens smoothly into a glossy set jelly.

Swap the lemon

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

  1. Raisinfits better
  2. Vanillafits better
  3. Lemonthe original
  4. Figfits about as well

Fit is the average pairing score against sugar, egg, 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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