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Bread Workshop

Baking with old dough: a practical introduction to pâte fermentée

Editors at Bakedemy ·
A small covered tub of risen bread dough beside freshly mixed dough on a flour-dusted bakery table.
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A small piece of yesterday’s bread dough can be an ingredient in today’s loaf. In a planned formula, that fermented portion is called pâte fermentée. Its value comes from controlled fermentation, not simply from being a leftover that needs using.

King Arthur Baking’s preferment reference describes pâte fermentée as mixed dough containing flour, water, salt and yeast. That last pair matters: it is different from an unsalted poolish and from a maintained sourdough culture. A recipe written for one preferment should not be converted by swapping equal spoonfuls of another.

Count what is already in the piece

Suppose a formula includes a portion of fermented dough as well as fresh flour and water. The fermented portion already contributes ingredients to the final loaf. Adding an unmeasured handful to a completed recipe changes the flour total, hydration and salt balance at the same time. A result that feels firmer or rises differently may reflect those changes rather than a mysterious failure of fermentation.

For a first attempt, choose a tested pâte-fermentée formula that states the amount to prepare, its storage conditions and when to use it. Weigh the portion into a labelled container before the baking day becomes busy. Write the preparation time on the label and keep the formula alongside it.

A useful two-day baking note

  1. Record when the preferment was mixed and where it was kept.
  2. Note its appearance when the final dough is mixed.
  3. Record the final dough temperature if your usual method includes it.
  4. Compare the baked loaf after cooling, including flavour, crust and crumb.

Those observations let you repeat a successful schedule. “Overnight” can mean very different conditions in a cool kitchen and a warm one. Follow the recipe’s guidance rather than treating the clock alone as proof of readiness.

Use only dough that has been handled and stored appropriately. Pâte fermentée is a deliberate bread-making technique; it is not a reason to rescue dough with an uncertain history. Once the method is familiar, change one planned variable at a time so the next loaf teaches you something useful.

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