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 ↓
To Make Puff Pastry
Ingredients
Directions
The book says “a very hot oven”. The 400°F (200°C) in the steps is the modern equivalent, not the book's own figure.
Prepare the dough
Squeeze the butter in a towel to remove all water.
Make a well in the flour and add the egg yolk, cold water, and lemon juice.
Mix until a firm, smooth paste forms, adding more water if needed. Knead the dough if necessary.
Roll it out into a thin, oblong shape with square corners.
Laminate the dough
Flatten the butter into a square about half the size of the dough. Place the butter square on one end of the dough.
Fold the other end of the dough over the butter. Press the edges together to seal it in.
Turn the dough half round.
Roll it out, folding and turning it seven times instead of four. Fold it double the last time.
Roll out to the desired thickness.
Bake
Bake in a very hot oven at 400°F (200°C) to prevent the butter from melting out.
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 + eggtop 15% of all pairsSmell alikelowCooked together106,462 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Butter + lemontop 16% of all pairsSmell alikemoderateCooked together41,227 recipes
Shared aroma: 3-hexenal (apple, fruity).
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Flour + lemontop 17% of all pairsSmell alikemoderateCooked together30,404 recipes
Shared aroma: isobutyraldehyde (malty, green).
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Egg + buttertop 17% of all pairsSmell alikemoderateCooked together118,967 recipes
Shared aroma: decanal (soap, orange peel).
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 structure of the dough that holds the layers of butter.
- Butter
- Creates separate layers that steam and lift the pastry as it bakes.
- Egg yolk
- Adds richness and helps bind the dough together.
- Cold water
- Hydrates the flour so the dough forms a firm, workable paste.
The step that matters
Keeping the butter cold and in distinct layers. If the butter softens or melts into the dough, the layers blend together and the pastry will not rise into flaky sheets. Cold dough and a very hot oven keep the butter solid until steam forms during baking.
Swap the lemon
How well each one fits the dish's main ingredients (flour, egg, butter):
- Raisinfits better
- Vanillafits better
- Lemonthe original
- Coconutfits about as well
Fit is the average pairing score against flour, egg, butter. 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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