30 minutes after the last folding, form the final dough ball:
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Sprinkle the cookie sheet with about 1 Tbsp flour.
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Turn the dough from the plastic container onto the floured cookie sheet.
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Wet hands so the dough will not stick to them. The moisture also makes the folded dough stick better at the seam.
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Gently pat dough into a rounded rectangle of roughly uniform thickness.
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Form the final ball shape by folding the dough from each of four sides and then sealing the seam.
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Line the proofing basket with a cloth and then sprinkle the cloth with about 1 Tbsp flour.
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Lift the dough ball from the cookie sheet and place into proofing basket with the seam down.
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Fold the ends of the cloth over the dough ball to cover it.