Laminated Dough
Laminated dough is a pastry dough made by wrapping a slab of butter in dough, then rolling and folding it repeatedly to create many alternating paper-thin layers of fat and dough. In the oven, those layers puff apart into the flaky, airy structure of croissants, Danish, and puff pastry.
How the layers puff
Each sheet of butter keeps the dough layers on either side from sticking together. In a hot oven:
- Water in the dough and butter (butter is about 16–18% water) turns to steam.
- Steam pushes the dough layers apart, like tiny balloons inflating side by side.
- The butter melts and fries each dough layer from both sides, turning them crisp and golden.
Yeasted laminated doughs (croissant, Danish) also rise from carbon dioxide, giving a softer, honeycomb interior. Unyeasted puff pastry relies entirely on steam.
Folds and layers
Bakers count lamination in "turns" or "folds":
- Single (letter) fold: fold in thirds. Triples the layers.
- Double (book) fold: fold both ends to the middle, then in half. Quadruples them.
| Pastry | Typical folds | Approx. butter layers |
|---|---|---|
| Croissant | 3 single folds | 27 |
| Croissant (alternate) | 1 double + 1 single | 12 |
| Danish | 3 single folds | 27 |
| Classic puff pastry | 6 single folds | 729 |
More isn't always better. Too many folds on a yeasted dough makes layers so thin they merge, and you lose the flaky effect.
Keeping butter and dough in sync
Lamination works only if butter and dough have similar firmness. Aim for butter at about 13–16 °C (55–60 °F), where it bends without cracking.
- Too cold: butter shatters into chunks, leaving patchy layers.
- Too warm: butter smears into the dough or squeezes out the sides.
Chill the dough 20–30 minutes between folds to keep everything cool and to relax the gluten so it rolls without shrinking back.
Baking tips
- Proof croissants cool, around 24–27 °C (75–80 °F), until jiggly and roughly doubled. Warmer and the butter melts out.
- Bake hot: puff pastry around 200–220 °C (400–425 °F); croissants around 190–200 °C (375–400 °F). High heat sets the layers before butter leaks.
- Cut with a sharp blade, straight down. Dragging a dull knife seals the edges and stops them from rising.
- Egg wash only the top. Wash dripping down the sides glues the layers shut.
Shortcuts
Rough puff (blitz) pastry mixes chunks of butter into the dough, then gives it a few folds. It rises less evenly but takes a fraction of the time and works well for turnovers, tarts, and savoury pies.
Questions
What temperature should butter be for laminating dough?
Cool but pliable, around 13–16 °C (55–60 °F). It should bend without cracking. Colder butter shatters into pieces; warmer butter smears into the dough and the layers merge.
How many layers does puff pastry have?
Classic puff pastry gets six single (letter) folds, which multiplies the butter layers by three each time for 729 butter layers, with dough layers between them.
What is the difference between croissant dough and puff pastry?
Croissant and Danish dough contain yeast, so they rise from both fermentation and steam and have a soft, bready interior. Puff pastry has no yeast and rises from steam alone, so it's crisper and shatters more.
Why did butter leak out of my croissants in the oven?
Usually they were proofed too warm, above about 27 °C (80 °F), so the butter layers melted before baking, or the croissants were under-proofed and the oven was too cool to set the layers quickly.