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Custards, Creams, Etc

A chilled lemon custard made by mixing heavy cream, lemon zest, juice, and sugar, then freezing with salt and ice.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Cream and sugar are a kitchen classic. They rank in the top 9% of all ingredient pairs, and cooks put them together in 43,450 recipes. Both carry 2,3-butanedione, which smells butter, sweet. The science ↓

Custards, Creams, Etc

Ingredients

Directions

Prepare the cream

  1. Zest and juice the lemons.

  2. Mix 1 pint of cream with sugar and lemon juice.

  3. Gradually beat this mixture into the remaining 3 pints of cream.

  4. Cover and let it infuse for 30-60 minutes.

  5. Taste and adjust with more lemon juice or sugar if needed.

  6. Strain the mixture through a fine strainer to remove lemon peel.

Freeze

  1. Pack a freezer with equal parts coarse salt and crushed ice.

  2. Place the strainer in the freezer and cover it tightly.

  3. While freezing, stir and scrape the cream frequently to ensure smoothness.

  4. Avoid letting any salt get into the cream.

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. Cream + sugartop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

    Shared aroma: 2,3-butanedione (butter, sweet).

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

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

  3. Lemon + creamtop 30% of all pairs
    Smell alikelow
    Cooked together15,640 recipes

    Shared aroma: acetic acid (sour, vinegar).

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

Heavy cream
Provides fat and richness, giving the frozen custard a smooth, creamy texture.
Sugar
Sweetens the custard and lowers the freezing point, keeping it soft and scoopable.
Lemons
Supply the acidity and bright aroma; the zest adds fragrant oils and the juice adds sourness.

The step that matters

Scraping and stirring while freezing. Stirring breaks up ice crystals as the cream freezes, keeping the texture smooth rather than icy. Skipping it lets large crystals form.

Swap the lemon

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

  1. Vanillafits better
  2. Strawberryfits better
  3. Raspberryfits better
  4. Lemonthe original

Fit is the average pairing score against cream, sugar. 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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