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Dessert

Acid Pie

A sweet pie made with crushed bread, sugar, water, lemon juice, tartaric acid, and egg, baked until set.

From an old cookbook · modernised transcription
From a historical cookbook (Internet Archive) · 6 ingredients
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Why it works: Bread and egg are a kitchen classic. They rank in the top 13% of all ingredient pairs, and cooks put them together in 22,662 recipes. Both carry (e)-2-octenal, which smells fatty, green. The science ↓

Acid Pie

Ingredients

Directions

The book gives no oven temperature. The 350°F (175°C) in the steps was added when the recipe was transcribed, as a starting point.

Prepare

  1. In a bowl, combine the crushed bread or crackers and sugar.

  2. In a saucepan, bring the water to a boil.

  3. Add the lemon juice and tartaric acid to the boiling water.

Make the filling

  1. Pour the hot mixture over the bread and sugar, stirring well.

  2. Beat the egg and fold it into the mixture.

Bake

  1. Pour the mixture into a pie crust and bake at 350°F (175°C) until set.

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. Bread + eggtop 13% of all pairs
    Smell alikemoderate
    Cooked together22,662 recipes

    Shared aroma: (e)-2-octenal (fatty, green).

  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. Bread + lemontop 20% of all pairs
    Smell alikemoderate
    Cooked together8,445 recipes

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

  5. Sugar + eggtop 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

Soft bread or crackers
Bulks out the filling and soaks up the liquid to form a soft body.
Sugar
Adds sweetness that balances the sharp lemon and tartaric acid.
Lemon juice
Provides the main sour, fresh flavour of the pie.
Tartaric acid
Adds concentrated sourness that sharpens the flavour.
Egg
Helps set the filling and gives it a richer, firmer texture when baked.

The step that matters

Fold in the egg gently after the hot mixture has cooled slightly. Adding a beaten egg to a very hot mixture can cause it to scramble into small curds instead of blending smoothly. Folding gently keeps the filling smooth so it sets evenly in the oven.

Swap the lemon

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

  1. Vanillafits better
  2. Datesfits better
  3. Figfits better
  4. Lemonthe original

Fit is the average pairing score against bread, 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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