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Dessert

Lemon Frappe

A chilled lemon dessert made with milk, cream, sugar, lemon rind, juice, egg whites, and frozen.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 5 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 ↓

Lemon Frappe

Ingredients

Directions

Make the base

  1. Heat the milk with the rind of 1 lemon and the sugar until warm.

  2. Cool the mixture and partially freeze it.

  3. Add the juice of 4 lemons and freeze again.

Fold and finish

  1. Beat the egg whites until stiff.

  2. Whip the cream until stiff.

  3. Fold the beaten egg whites and whipped cream into the lemon mixture.

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. Milk + lemontop 15% of all pairs
    Smell alikemoderate
    Cooked together19,053 recipes

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

  3. Milk + creamtop 18% of all pairs
    Smell alikemoderate
    Cooked together29,399 recipes

    Shared aroma: delta-dodecalactone (sweet, creamy).

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

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

  5. Milk + eggtop 18% of all pairs
    Smell alikemoderate
    Cooked together88,785 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

Egg whites
Beaten until stiff, they add air and a light, airy texture to the frozen dessert.
Cream
Whipped until stiff, it adds richness and a smooth, creamy body to the frappe.
Sugar
Sweetens the mixture and balances the sharpness of the lemon juice.
Lemons
Juice supplies the main acidity and flavor; rind adds aromatic citrus oils during heating.
Milk
Forms the liquid base of the frappe, adding body and mild dairy flavor.

The step that matters

Partially freezing the lemon base before folding. Freezing only partway leaves a slushy texture that can hold the whipped cream and beaten egg whites. If it freezes solid, the folded-in foams cannot blend in evenly, and if it stays liquid, the mixture will not set into a frappe.

Swap the lemon

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

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

Fit is the average pairing score against milk, cream, sugar, 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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