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Dessert

Napoleon Cakes

A layered pastry made with flour, sugar, butter, ground almonds, and egg yolk, baked and layered with jam.

From an old cookbook · modernised transcription
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Why it works: Flour and almond are a kitchen classic. They rank in the top 5% of all ingredient pairs, and cooks put them together in 8,673 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓

Napoleon Cakes

Oven, in the book's wordsA moderate oven

Ingredients

Directions

The book says “a moderate oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.

Prepare the dough

  1. Preheat the oven to 350°F (175°C).

  2. Rub the butter into the flour.

  3. Add the sugar and ground almonds.

  4. Mix with enough egg yolk to form a very stiff paste.

  5. Set aside for 1 hour.

  6. Roll the mixture into 2 thin sheets.

Bake and assemble

  1. Bake until pale brown.

  2. Spread one sheet with jam or jelly and place the other on top.

  3. Cut into fingers while hot.

  4. Sprinkle icing sugar 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. Flour + almondtop 5% of all pairs
    Smell alikemoderate
    Cooked together8,673 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  2. Butter + almondtop 11% of all pairs
    Smell alikemoderate
    Cooked together9,245 recipes

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

  3. Flour + buttertop 12% of all pairs
    Smell alikelow
    Cooked together124,287 recipes

    Shared aroma: isobutyraldehyde (malty, green).

  4. Flour + sugartop 15% of all pairs
    Smell alikemoderate
    Cooked together92,116 recipes

    Shared aroma: phenylacetaldehyde (hawthorne, honey).

  5. Flour + eggtop 15% of all pairs
    Smell alikelow
    Cooked together106,462 recipes

    Shared aroma: isobutyraldehyde (malty, green).

Flour and butter barely smell alike, yet cooks put them together in 124,287 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

Flour
Forms the main structure of the dough once bound with butter and egg yolk.
Butter
Rubbed into the flour to add richness and a tender, crumbly texture.
Egg yolk
Binds the dry ingredients into a stiff paste that holds its shape when rolled.
Ground almonds
Add nutty flavour and a slightly moist, fine texture to the dough.
Sugar
Adds sweetness and helps the surface brown during baking.

The step that matters

Bake until pale brown. Thin sheets of this rich, buttery dough can easily over-brown or dry out. Pulling them when just pale golden keeps them tender and prevents bitterness from scorched sugar and nuts.

“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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