Flavour & Fire
The Sourdough Journal
Stretch, Fold & Dough Development
A few gentle movements, and the dough learns to carry itself.
After mixing, the dough is only at the beginning of its development. It may feel soft, sticky and rather loose, with little strength to hold its own shape. As fermentation progresses, that gradually begins to change. By stretching and folding the dough at the right moments, you help develop the structure that will eventually make it stronger, more elastic and better able to hold its shape.
It does not have to be forceful. Much of sourdough development comes from small movements repeated over time. You are not trying to make the dough strong all at once; you are simply giving it the opportunity to build a little more strength each time you handle it.
What Happens When You Fold the Dough?
At first glance, dough may seem soft and almost shapeless, but beneath your hands its structure is constantly developing.
When you stretch the dough, the protein strands that form the gluten network are extended and organised in a particular direction. Folding the dough back over itself brings that developing structure together, while repeated handling gradually gives the dough more strength and cohesion.
You are not simply redistributing air or working your way through another step in a recipe. You are helping the dough become better able to support itself.
The difference becomes particularly noticeable when you return to the dough after a period of rest and feel how it has changed.
Stretch & Fold
The classic stretch and fold is probably the best-known way of developing dough during bulk fermentation.
With slightly damp hands, you take hold of one side of the dough and gently stretch it upwards until you feel resistance, then fold it back over itself. Turning the bowl and repeating the movement around the dough gives it structure and tension from different directions.
The important word here is gently. You want to stretch the dough, but not so far that it tears or is placed under unnecessary strain. As the structure develops, the dough will naturally begin to offer more resistance while also becoming more elastic.
The first round may still feel loose and awkward. A few rounds later, the same dough can already feel noticeably stronger, smoother and more cohesive.
Coil Folds
A coil fold works on much the same principle, but feels quite different in your hands.
Instead of stretching one side of the dough upwards, you slide your hands underneath the dough and gently lift it from the centre or underneath. The dough stretches under its own weight before folding back underneath itself. You then turn the bowl and repeat the movement.
Because much of the movement comes from the weight of the dough itself, coil folds offer a particularly gentle way of building further strength without repeatedly gripping or pulling at the dough.
They tend to work especially well once the dough has already developed some structure. A very early, loose dough may not yet have enough strength to lift neatly as one piece, while a stronger and more elastic dough can begin to behave almost like a single, living shape.
Learning to recognise that difference is just as important as learning the movement itself.
Slap & Fold
Not every form of dough development has to begin gently.
With the slap and fold technique, the dough is placed on a work surface and repeatedly lifted, stretched and brought back down onto the surface in a controlled movement. Repeating the action can develop considerable structure in a relatively short period of time.
It is a more active technique than stretch and folds or coil folds, and can be useful when a dough feels particularly loose and sticky at the beginning. As the gluten network develops, the dough begins to change beneath your hands: it becomes smoother and more elastic, with an increasing ability to hold itself together.
That is also the point at which you can stop. The aim is not to keep working the dough for as long as possible, but to give it enough development to move comfortably into the next stage.
For many sourdough doughs, this more intensive technique is not necessary at all. Time, rest and a few gentle folds can achieve the same broader purpose, simply by taking a different route.
When Should You Fold the Dough?
The right moment matters more than a fixed number of folds.
Many sourdough doughs are folded several times during the earlier part of bulk fermentation, while the dough is still active and responsive to further development. As fermentation progresses, however, the dough becomes lighter and more delicate. At that point, you want to interfere less and preserve more of the structure and gas that have already developed.
A schedule can therefore be a useful starting point, but the dough itself remains the better guide.
If the dough still feels loose and spreads easily after resting, another round of folds may help. If it already feels stronger, holds its shape more readily and contains visible air, it may be better left alone.
What Does Stronger Dough Feel Like?
Dough development is something you eventually learn to feel rather than simply measure.
Early in the process, dough may feel loose and poorly connected, slipping easily between your fingers when you lift it. After a few periods of rest and folding, it begins to develop tension. It still stretches, but now there is resistance; it feels more elastic and can be lifted more easily as one piece.
You may notice the difference in the bowl as well. Where the dough once spread quickly across the bottom, it may begin to stay together more naturally. Its surface can become smoother, while the dough itself feels lighter, springier and more alive.
These are not isolated signs. Together, they tell you that something is changing beneath the surface.
More Folding Is Not Always Better
Once you notice that a fold makes the dough stronger, it can be tempting to keep going. But here too, more does not automatically mean better.
Too much or overly vigorous handling can place unnecessary stress on the dough and disturb some of the gas that has developed during fermentation. The dough also needs time to relax between handling, allowing its structure to continue developing rather than being constantly worked.
That is why a calm rhythm often works better than constant intervention: fold, rest, feel the dough again, and then decide whether it needs anything more.
You are not working against the fermentation. You are working with it.
From Structure to Fermentation
As the dough becomes stronger, what you can do with it begins to change as well.
A well-developed dough is better able to hold its shape, retain the gases produced during fermentation and eventually respond more predictably when you shape it. But structure never exists in isolation. A strong dough that has not fermented enough will behave very differently from an equally strong dough that has already progressed further through fermentation.
That is why dough development is not an end in itself. It is one part of a larger process in which flour, water, gluten, fermentation, temperature and time are constantly interacting.
The real skill is not in performing one folding technique perfectly. It is in learning to recognise when the dough is becoming stronger, when it has had enough handling and when the best thing you can do is leave it alone.
A few gentle movements, at the right moment, can be enough to transform a loose dough into something that has learned to carry itself.
A few gentle movements, and the dough learns to carry itself.