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Dessert

Lemon Custard Jelly

A lemon gelatin dessert topped with a sweet custard and beaten egg whites.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 11 ingredients
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Why it works: Milk and vanilla are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 19,187 recipes. Both carry ethyl caproate, which smells fruity, apple peel. The science ↓

Lemon Custard Jelly

Ingredients

Directions

Make the jelly

  1. Soak the gelatin in a little cold water for 1 hour.

  2. In a saucepan, combine 2 pints of cold water, the thinly pared rind of 3 lemons, and the juice of the same lemons.

  3. Add 1 cup of sugar and bring to a boil.

  4. Stir in the soaked gelatin until dissolved, then simmer for 5 minutes.

  5. Pour the mixture into an earthen dish to cool.

Make the custard

  1. For the custard, heat 1 quart of milk with 1 cup of sugar, a pinch of salt, and vanilla.

  2. Whisk in the yolks of 5 eggs and cook until thickened, then set aside to cool.

Assemble and serve

  1. When ready to serve, cut the jelly into small squares and place in a dessert dish.

  2. Pour the custard over the jelly and top with the beaten egg whites.

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. Milk + vanillatop 5% of all pairs
    Smell alikemoderate
    Cooked together19,187 recipes

    Shared aroma: ethyl caproate (fruity, apple peel).

  2. Gelatin + sugartop 7% of all pairs
    Smell alikemoderate
    Cooked together2,778 recipes

    Shared aroma: ethanol (alcoholic, ethereal).

  3. Sugar + vanillatop 8% of all pairs
    Smell alikelow
    Cooked together35,032 recipes

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

  4. Lemon + vanillatop 15% of all pairs
    Smell alikemoderate
    Cooked together5,961 recipes

    Shared aroma: eucalyptol (eucalyptus, herbal).

  5. Lemon + milktop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

Sugar and vanilla barely smell alike, yet cooks put them together in 35,032 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

Gelatin
Sets the lemon liquid into a firm, sliceable jelly.
Egg yolks
Thicken the milk custard as they cook and add richness.
Egg whites
Beaten and spooned on top, giving a light, airy topping.
Milk
Forms the base of the custard, adding creaminess.
Lemon juice
Adds sharp acidity that balances the sugar in the jelly.

The step that matters

Cooking the custard until thickened. Egg yolks thicken as their proteins coagulate with heat, but overheating can curdle the custard. Cook gently and stop once it coats a spoon.

Swap the lemon

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

  1. Figfits better
  2. Peachfits better
  3. Strawberryfits better
  4. Lemonthe original

Fit is the average pairing score against gelatin, sugar, milk, vanilla, egg. 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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