Cooking science

Gluten relaxing

Worked dough is elastic — pull it and it pulls back. Left alone, it relaxes and becomes extensible, and it can then be rolled or shaped without fighting. Almost every "my pastry shrank" and "my dough will not roll out" problem is a resting problem.

Elastic and extensible are different things

Working a dough lines up and cross-links gluten proteins into a network. That network is elastic — stretch it and it wants to return to where it was.

Left to rest, some of the bonds within that network rearrange and release tension. The dough becomes extensible: it will stretch and stay stretched rather than snapping back.

Both are needed. A dough with no elasticity cannot hold gas and collapses; a dough with no extensibility cannot be rolled or shaped and tears. Resting is how you move from one to the other at the right moment.

Where the lack of a rest shows

• Pastry shrinking down the sides of a tin, because it was rolled while still tense and stretched into the tin.
• Pizza dough that will not stretch and springs back to a small disc.
• Pasta dough that fights the roller and tears at the edges.
• Bread dough that resists shaping and tears on the surface.
• Tough pastry, over-worked and then rolled immediately.
• Uneven flatbreads, thicker where the dough sprang back.
• A loaf that bursts at a random point rather than at the slash.

How long to rest

Shortcrust pastry

Thirty minutes in the fridge after making, and again after lining the tin. Both matter.

Pasta dough

Thirty minutes at room temperature, wrapped. It transforms how it rolls.

Pizza dough

A long cold ferment does this and much else. At minimum, twenty minutes after dividing before shaping.

Bread dough

A bench rest of fifteen to twenty minutes between pre-shaping and final shaping.

Flatbreads

Twenty minutes after kneading makes them roll far more evenly.

Choux and batters

Different mechanism — resting a batter hydrates the flour rather than relaxing gluten.

Using it in practice

1. If a dough fights you, stop. Cover it and walk away for twenty minutes rather than forcing it.
2. Rest pastry twice — after mixing, and again after lining the tin and before baking.
3. Never stretch pastry into a tin. Press it in gently, and leave the excess hanging over the edge to trim after baking.
4. For pizza, divide into balls and let them relax before shaping. A ball that resists is not ready.
5. Cold slows relaxation as well as everything else, so a fridge rest is longer than a room-temperature one.
6. Warm dough relaxes faster and is also stickier and harder to handle. Pick your compromise.
7. For bread, use the bench rest between pre-shape and final shape. It is the step most home bakers skip and it makes shaping far easier.

Common questions