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Dessert

Italian Custard

A chilled custard made with egg yolks, sugar, lemon juice, topped with whipped egg whites and currant jelly.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 4 ingredients
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Why it works: Sugar and lemon are a kitchen classic. They rank in the top 18% of all ingredient pairs, and cooks put them together in 53,532 recipes. Both carry 2-nonenal, which smells fatty, green. The science ↓

Italian Custard

Ingredients

Directions

Make the custard

  1. Beat the egg yolks until creamy.

  2. Add sugar and lemon juice, continuing to beat until thickened like cream.

  3. Pour the mixture into custard glasses.

Make the topping

  1. Beat the egg whites until stiff.

  2. Whip in a little currant jelly until evenly colored.

  3. Heap the mixture on top of the custard in the glasses.

Chill and serve

  1. Chill in the refrigerator and serve very cold.

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

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

  2. Egg + lemontop 19% of all pairs
    Smell alikelow
    Cooked together44,316 recipes

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

  3. Lemon + curranttop 20% of all pairs
    Smell alikelow
    Cooked together4,270 recipes

    Shared aroma: alpha-pinene (pine, turpentine).

  4. Egg + sugartop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

  5. Egg + curranttop 26% of all pairs
    Smell alikelow
    Cooked together8,734 recipes

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

Sugar and lemon 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

Eggs
Yolks thicken the custard base, and whipped whites give the topping an airy, light structure.
Sugar
Sweetens the custard and helps the yolk mixture thicken as it is beaten.
Lemon juice
Adds acidity that balances the sweetness of the sugar and jelly.
Currant jelly
Adds sweetness, fruity flavor, and the colour of the topping.

The step that matters

Beat the egg whites until stiff. Whites trap air when whipped, creating the foam that holds the topping up. If under-beaten, the foam is loose and slumps; if over-beaten, it turns grainy and dry.

Swap the currant

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

  1. Orangefits better
  2. Vanillafits better
  3. Limefits better
  4. Currantthe original

Fit is the average pairing score against egg, sugar, lemon. 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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