Laminated dough layers
Lamination wraps a block of butter inside dough, then rolls and folds it again and again to build many thin alternating layers. In the oven, water in the butter turns to steam and pushes the layers apart, while the dough sets around the gaps.
Keep the butter cold but pliable
The butter has to be firm but pliable, so it rolls out as a sheet instead of smearing into the dough. Too warm and it blends in. Too cold and it cracks into shards. Chilling between folds also relaxes the gluten, so the dough stops snapping back.
Test yourself
Questions from the interactive lesson, with the answer and the why.
What pushes the layers apart in a baking croissant?
Steam from water in the butter and dough. Water turns to steam and pushes the dough sheets apart.
True or false: If the butter melts into the dough while you roll it, you still get the same flaky layers.
False. Melted butter soaks into the dough, so the separate layers vanish.
What went wrong? You laminate dough in a warm kitchen. Butter squishes out of the dough, and the croissants bake up dense and greasy.
The butter softened and mixed into the dough. Without distinct butter sheets, no layers form and the fat just soaks in.
Fill the blank: Layers stay distinct only while the butter is ___ enough to hold its sheet shape.
Layers stay distinct only while the butter is firm enough to hold its sheet shape. Cold, firm butter rolls into a sheet instead of smearing.
The dough keeps shrinking back as you roll it. What is the best move?
Chill it so the gluten relaxes. A rest lets gluten loosen, and the butter firms up again.