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Dessert

Prune Pie

A fruit pie made with prunes, sugar, lemon juice, egg whites, baked in a crust and served with whipped cream.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Sugar and cream 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 ↓

Prune Pie

Ingredients

Directions

Make the filling

  1. Cook the prunes until soft.

  2. Strain the cooked prunes through a sieve or chop them.

  3. In a bowl, combine the prunes with sugar and lemon juice.

  4. Beat the mixture until smooth.

  5. While the mixture is still hot, fold in the beaten egg whites gently.

Assemble and serve

  1. Pour the filling into the baked pie crust.

  2. Let the pie cool.

  3. Serve with whipped cream on top.

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 + creamtop 9% of all pairs
    Smell alikemoderate
    Cooked together43,450 recipes

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

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

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

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

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

  4. Sugar + eggtop 21% of all pairs
    Smell alikemoderate
    Cooked together122,807 recipes

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

  5. Egg + creamtop 24% of all pairs
    Smell alikelow
    Cooked together42,166 recipes

    Shared aroma: acetic acid (sour, vinegar).

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

Prunes
Provide the main body, sweetness and fruity flavour of the filling.
Egg whites
Whipped into the hot filling to add lightness and help it set as it cools.
Sugar
Adds sweetness and helps balance the tartness of the lemon juice.
Lemons
Add acidity that brightens the sweet prune flavour.

The step that matters

Folding in the egg whites while the mixture is hot. Egg whites fold in most easily and hold the most air when the base is warm but not cooked again; folding gently keeps the foam from deflating, which keeps the filling light.

Swap the lemon

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

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

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