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Dessert

Prune Fluff

A chilled dessert made from prunes, lemon juice, powdered sugar, and whipped egg whites.

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 ↓

Prune Fluff

Ingredients

Directions

Prepare the prunes

  1. Wash and soak the prunes overnight in cold water.

  2. The next morning, cook the prunes in a double boiler over low heat until done.

  3. Remove the prunes and boil the juice down to ½ cup.

  4. Pit the prunes, add the juice, and rub through a colander.

Whip and serve

  1. Chill the churn and keep the egg whites cold.

  2. Combine all ingredients in the churn and whip until stiff, about 10 to 20 minutes.

  3. Serve very cold in tall glasses.

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

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

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 fruit flavor and body once cooked and rubbed smooth.
Egg whites
Whipped into foam to create the light, airy structure of the fluff.
Powdered sugar
Sweetens the mixture and dissolves easily into the whipped foam.
Lemon juice
Adds acidity that brightens the prune flavor and stabilizes the egg white foam.

The step that matters

Whipping the egg whites until stiff. Cold egg whites whip to greater volume and hold their shape better. Over-whipping makes them dry and grainy, and under-whipping leaves the fluff soupy and unstable.

Swap the lemon

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

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

Fit is the average pairing score against egg, 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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