At the 8-hour mark, remove the dough from the fridge and allow it to come to room temperature (this will take about 2 hours).
Prepare your oven by removing all but 1 rack from the oven. Place the remaining oven rack in the bottom groove.
Place your Dutch oven in the oven on the bottom rack.
About 45 minutes before your dough is ready to bake (1 hour 15 minutes after pulling it from the fridge), preheat the oven to 450ºF (232ºC) with your Dutch oven inside the oven (preheating the baking vessel gives the finished bread better oven-spring).
Approximately 10 minutes before you’re ready to bake, turn the dough out onto a silicone bread mat or a piece of parchment paper.
Using a bread lame, razor, or sharp knife, make a cut (slash) in the middle of the boule, and one curved cut on the left side. This is called scoring the dough, and it helps control the shape of the bread and allows it to rise evenly during baking.
Place the dough into the Dutch oven, then add 3-4 ice cubes around the perimeter, and cover with a lid. This will create steam and moisture, helping the dough to rise and create a slightly softer crust (compared to baking without steam).
Bake at 450ºF (232ºC) for 25 minutes with the lid on.
After 25 minutes, remove the lid, reduce the heat to 375ºF (190ºC), and bake for an additional 25-30 minutes, or until the bread reaches an internal temperature of 200-205ºF (93-96ºC).
Carefully remove the bread from the Dutch oven and place it on a cooling rack. Allow to cool for at least 30 minutes (but 2+ hours is ideal for texture) before slicing and serving.