Step 1 – Build a Levain (Optional, Classic Method): The evening before, mix 50 g starter, 50 g flour, and 50 g water. Let sit at room temperature until doubled and bubbly by morning. Use 150 g of this levain for the dough.
Step 2 – Mix & Autolyse: In a large bowl, stir 150 g active levain (or starter) with 420 g warm water. Add 660 g flour and mix until no dry bits remain. Cover and rest 30–60 minutes.
Step 3 – Add Salt: Sprinkle 13 g kosher salt over the dough. With wet hands, press and fold until the salt is fully incorporated and the dough feels smoother.
Step 4 – Stretch & Folds: Over the next 2–3 hours, perform a set of stretch-and-folds every 30 minutes. After the final set, let the dough rest until aerated and noticeably expanded.
Step 5 – Divide & Shape: Turn dough onto a lightly floured surface. Divide into 4 equal pieces. Gently tighten each into a round. Rest 10 minutes, then shape more firmly into tight rounds. Place seam-side up in floured bowls or proofing baskets.
Step 6 – Cold Fermentation: Cover and refrigerate the shaped dough for at least 12 hours (up to 48 hours) to develop flavor and structure.
Step 7 – Preheat & Bake: Preheat oven to 475°F (245°C). Keep dough cold until loading. Bake using your setup Dutch oven, baking sheet with steam tray, or stone/steel until deeply golden and crusty. Brush with optional egg wash just before baking for shine.
Step 8 – Cool Completely: Transfer to a wire rack and cool fully to set the crumb and avoid gumminess.
Step 9 – Make the Bowls: Using a serrated knife, cut a circular lid from the top at a slight inward angle. Hollow the center, leaving ~½-inch (1.25 cm) walls. Save the soft interior for dipping.
Step 10 – Fill & Serve: Add hot soup or dip just before serving. Replace the lid or serve it on the side to keep contents warm.