Oven SpringThe first minutes in the oven. Where the bread makes its final, fastest growth.What HappensAs soon as the dough enters the hot oven, the gases that built up during bulk fermentation and the cold proof heat up rapidly and expand.At the same time, the water in the dough turns into steam. That steam keeps the surface of the dough supple, allowing it to continue expanding before a crust forms and prevents further growth.This is oven spring — the moment when the bread develops its final volume and structure, long before the crust has finished colouring.Why the First Minutes MatterThe first 10–15 minutes in the oven largely determine how much the bread will still grow.After that, the crust begins to set, leaving the dough with much less room to expand. Everything you have done up to this point — a well-timed bulk fermentation, good tension during shaping, and a sharp score — comes together here.The Role of the LidThe lid of a Dutch oven traps the steam released naturally by the dough around the loaf.This humid environment keeps the surface supple for long enough to allow the bread to expand as much as possible.Without a lid, or with a baking vessel that does not seal well, the steam escapes too quickly. The crust then sets too early, resulting in less oven spring.That is why the lid stays on for the first 30 minutes, even when you’re tempted to take a look.What Good Oven Spring Looks LikeAfter baking, you can recognise strong oven spring by:- A clear, raised opening along the score — the “ear” bakers often talk about.- A noticeably greater volume than the dough had when it went into the oven.- An even, rounded shape without flat sides.When Oven Spring Falls ShortDisappointing oven spring is almost always the result of what happened before the dough entered the oven, rather than a problem with the oven itself.The dough may have been over- or under-fermented, the gluten structure may not have been strong enough, or there may not have been enough tension during shaping.See Process Control to learn how to better judge and time those earlier stages, and Bread Troubleshooting for concrete signs and solutions for common problems.Part of The Baking Process.Continue reading: Baking · Scoring · Process Control