In a large mixing bowl, combine the active sourdough starter, bread flour, warm water, and salt. Use a stand mixer, dough whisk, or your hands to mix until no dry flour remains. Cover and let rest for 1 hour at room temperature.
Perform 3 sets of stretches and folds, spaced 30 minutes apart. Cover the bowl in between each set.
Cover and allow the dough to rise about 50% in volume. Depending on your kitchen, this may take 3–6 hours. (In my 72°F Florida kitchen, it took about 4 hours.)
Generously flour your work surface and turn the dough out carefully. Flour the top and shape into a rectangle. Cut into 8 pieces without pressing the air bubbles. Place onto two parchment-lined baking sheets to avoid overcrowding. Cover with a towel and let rise for 2 hours, or until puffy.
Preheat oven to 475°F (246°C). Bake the ciabatta for 10 minutes, then reduce oven temperature to 425°F (218°C) and bake another 20 minutes, until golden brown and crusty. Cool for at least 30 minutes before slicing. Enjoy!Did you make this recipe?
The next time you make it, snap a picture, and share it to your socials. Tag @cookingkatielady and #cookingkatielady so I can admire your masterpiece and share with others!:)
Please note that my nutrition label is approximate and can have slight rounding.