Why it works: Flour and butter are a kitchen classic. They rank in the top 12% of all ingredient pairs, and cooks put them together in 124,287 recipes. Both carry isobutyraldehyde, which smells malty, green. The science ↓
Genoese Pastry or Cake
Ingredients
Directions
The book says “a moderately hot oven”. The 350°F (175°C) in the steps is the modern equivalent, not the book's own figure.
Prepare
Preheat the oven to 350°F (175°C).
Dry and sift the flour.
Separate the egg whites from the yolks.
Make the batter
Add the sugar to the yolks and beat vigorously until thick and creamy.
Stir in the melted butter.
Whip the egg whites to stiff peaks.
Gently fold the flour into the egg whites.
Combine the egg white mixture with the yolk mixture, mixing lightly but thoroughly.
Bake
Pour the batter into a greased and lined cake tin.
Bake for about 1 hour.
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 + buttertop 12% of all pairsSmell alikelowCooked together124,287 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Flour + sugartop 15% of all pairsSmell alikemoderateCooked together92,116 recipes
Shared aroma: phenylacetaldehyde (hawthorne, honey).
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Flour + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + eggtop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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Sugar + buttertop 17% of all pairsSmell alikemoderateCooked together98,233 recipes
Shared aroma: guaiacol (smoky, sweet).
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
- Eggs
- Whipped whites trap air that lifts the cake, and yolks add richness and structure.
- Fine flour
- Starch sets during baking, giving the sponge its structure once the eggs have expanded.
- Castor sugar
- Sweetens the batter and helps the yolks thicken and become creamy when beaten.
- Butter
- Adds fat that softens the crumb and gives a richer flavour.
The step that matters
Gently fold the flour into the egg whites. Whipped egg whites hold air bubbles that make the sponge rise. Vigorous stirring knocks that air out, so the cake turns out dense and flat.
“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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