Sourdough Demystified: Bulk Fermentation

Once the levain has risen and is showing lots of bubbles on top, we can see if we're ready to move onto the next step (bulk fermentation) by taking a spoonful of the levain dough and dropping it into a full cup of water. If it floats, that means we're good to proceed (because the dough is full of air, which is a sign of excellent yeast activity).

If the spoonful of dough sinks, wait a little longer. You may have tested too early, and there may be more time for the dough to rise. If you can't get it to float, don't advance to the next steps - it will just end in sadness with nothing works out from here on in. Instead, go back to working with your starter (at room temperature the whole time) discarding half, feeding (which is just adding flour and water), waiting for it to rise fully, discarding half, feeding.. on repeat until it's obvious that your starter is very "active" - meaning it's rising as quickly as possible after every feed. An active starter leads to an active levain which leads to a successful bulk fermentation which leads to a successful bake.

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Видео Sourdough Demystified: Bulk Fermentation канала Ryan Lowe