Feed your sourdough starter several hours before you plan to mix the dough so that it becomes bubbly doubles in volume and smells pleasantly tangy
In a large mixing bowl stir the warm water and active sourdough starter together until the starter is mostly dissolved
Add the bread flour to the bowl and mix with your hand or a sturdy spoon until no dry patches of flour remain. The dough will look rough and shaggy. Cover the bowl and let it rest for about thirty minutes
After the rest sprinkle the salt over the dough. Add the olive oil and honey or sugar if you are using them. With a slightly wet hand pinch and fold the dough until the salt and other ingredients are well mixed. The dough should start to feel smoother
Begin the first part of bulk fermentation. Over the next two hours complete three or four sets of stretch and folds about thirty minutes apart. To do this slide your hand under one side of the dough lift it up and fold it over the center. Turn the bowl and repeat from the other sides until you have folded the dough all around
After the last set of folds cover the bowl and let the dough rise at room temperature until it increases in volume by about half to three quarters. Depending on your kitchen this usually takes another one to three hours. The dough should look puffed with small bubbles around the edges and feel airy when you gently lift the bowl
Lightly flour your work surface. Turn the dough out gently so that you do not deflate it completely. Use a dough scraper or knife to divide the dough into four equal pieces
Shape each piece into a loose round by tucking the edges under. Let these rounds rest on the counter for about twenty minutes. This rest makes the dough easier to shape tightly later
For final shaping flip one round so the smooth side is down. Gently stretch one edge up and over toward the center and repeat from several directions to create surface tension. Flip the dough so the smooth side faces up and use your hands to drag it toward you in small motions so the top becomes tight and round. Repeat with the remaining pieces
Place the shaped rounds on a parchment lined baking sheet leaving space between each one. Cover them lightly with a kitchen towel and let them proof at room temperature until puffy and lighter. This final rise usually takes one to two hours. The dough should slowly spring back when pressed lightly with a fingertip
Alternatively for more flavor and flexible timing cover the shaped dough and refrigerate it for eight to twelve hours. You can bake the sourdough bread bowls directly from the refrigerator
About forty minutes before baking preheat your oven to about four hundred fifty degrees Fahrenheit or about two hundred thirty degrees Celsius. If you have a baking stone or steel place it on the middle rack. You can also place a sturdy empty pan on a lower rack to create steam later
When the oven is hot uncover the dough. If you like you can brush the tops lightly with olive oil or plant based milk for a gentle shine. Use a very sharp knife or bread lame to score each round with a simple cross pattern on top. This helps the bread expand evenly in the oven
Place the baking sheet on the hot stone or rack. For extra steam carefully pour a cup of hot water into the empty pan on the lower rack and close the oven door quickly
Bake the sourdough bread bowls for about twenty five to thirty minutes until they are well risen and deep golden brown. They should sound hollow when tapped on the bottom. If needed bake for a few more minutes to reach your preferred crust color
Transfer the baked bread bowls to a wire rack and let them cool completely. Cooling allows the crumb to set so the bowls stay strong when filled with hot soup
To turn each loaf into a bowl use a small serrated knife to cut a circle from the top. Lift off the top and gently pull out some of the soft interior while leaving thick walls and a solid base. Save the extra bread pieces for dipping
Fill the sourdough bread bowls with hot soup such as broccoli cheddar soup creamy potato soup or tomato basil soup and serve right away