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
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
In a large basin, combine the eggs and sugar.
Sift the flour and set aside.
Melt the butter in a saucepan.
Line a baking sheet with parchment paper and grease it with the melted butter.
Make the batter
Place the basin with eggs and sugar over a saucepan of hot water and whisk for 20 minutes.
Remove from heat, pour in the warm butter, and sift in the flour.
Pour the mixture into the prepared baking sheet and bake in a 350°F (175°C) oven for about 20 minutes, until pale brown and firm.
Finish and serve
While baking, warm the jam in a saucepan.
Once the pastry is done, turn it out onto a sugared paper, remove the greased paper, and spread the warm jam evenly over it.
Roll it up or cut it in half, fold it, and cut into squares.
Let cool before serving.
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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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).
-
Egg + buttertop 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
- Whisked with sugar over heat, they trap air and form the light, sponge-like structure.
- Flour
- Sets the crumb structure once baked, giving the sponge body and firmness.
- Butter
- Adds richness and a tender texture, and helps the crumb stay moist.
- Castor sugar
- Sweetens the sponge and helps stabilise the whisked egg foam.
- Jam
- Adds sweetness and fruity flavour, and moisture under the rolled sponge.
The step that matters
Whisking the eggs and sugar over hot water. Warming the eggs and sugar lets the foam reach full volume and hold air. Under-whisking leaves a dense pastry, and overheating can scramble the eggs.
“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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