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
Ingredients
Directions
The book says “a quick oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the sponge
Preheat the oven to 400°F (200°C).
Beat the eggs with the sugar, flour, and flavouring until smooth to make a sponge mixture.
Pour the sponge mixture into a large square sandwich tin and bake until set, ensuring the layer is not too thick.
Prepare the pastry
Roll out two thin pieces of puff pastry the same size as the sponge, prick them to prevent bubbles, and bake until lightly cooked.
Assemble and finish
Place one piece of baked pastry on a thick sheet of white paper, then place the sponge on top (top side up).
Spread a layer of apricot or raspberry jam over the sponge.
Top with the second piece of pastry, then spread icing over it and sprinkle with chopped almonds.
Allow to dry in a cool oven.
Once cold, cut into squares or oblongs with a sharp knife.
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.
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Flour + almondtop 5% of all pairsSmell alikemoderateCooked together8,673 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Almond + apricottop 5% of all pairsSmell alikestrongCooked together852 recipes
Shared aroma: eucalyptol (eucalyptus, herbal).
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Sugar + flourtop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Egg + flourtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Sugar + almondtop 18% of all pairsSmell alikemoderateCooked together15,679 recipes
Shared aroma: 1-penten-3-one (fish, pungent).
Egg and flour barely smell alike, yet cooks put them together in 106,462 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
- Eggs
- Whisked into the batter to give the sponge its light, airy structure.
- Sugar
- Adds sweetness and helps the sponge brown lightly as it bakes.
- Flour
- Provides the structure that holds the sponge together once set.
- Puff pastry
- Bakes into crisp, flaky layers that contrast with the soft sponge.
- Apricot or raspberry jam
- Adds fruity sweetness and moisture between the sponge and pastry layers.
The step that matters
Keep the sponge layer not too thick. A thick sponge takes longer to set through the centre and may stay moist or uneven, so bake it in a layer that sets evenly.
Swap the apricot
How well each one fits the dish's main ingredients (egg, sugar, flour, almond):
- Raisinfits better
- Vanillafits better
- Figfits better
- Apricotthe original
Fit is the average pairing score against egg, sugar, flour, almond. 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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