1. 1. Ensure Your Sourdough Starter is Super Active: Before mixing dough, check your starter. It should be bubbly, smell pleasantly yeasty and slightly sour, and reliably double or triple in size within a few hours of feeding. A weak starter won’t produce enough gas to create an open crumb. You can test its readiness by placing a small dollop in water; if it floats, it’s ready.

2. 2. Hydrate Your Flour Properly: Ensure your flour fully absorbs the water during the autolyse phase (mixing flour and water only, then resting). This allows gluten to start developing without the interference of salt or starter, leading to a more extensible and less dense dough. Look for the dough to feel smoother and more pliable after this rest.

3. 3. Develop Strong Gluten Structure: This is critical. Strong gluten traps the gases produced by fermentation, creating those desirable air pockets. Use techniques like stretch and folds or coil folds during bulk fermentation. Aim for the dough to become increasingly smooth, elastic, and able to pass the “windowpane test” – where you can stretch a small piece thin enough to see light through it without tearing. If it tears easily, it needs more development.

4. 4. Manage Bulk Fermentation (First Rise) Effectively: Don’t rely solely on a clock. Instead, observe your dough. It should increase in volume by 30-50% (depending on the recipe and desired crumb), feel gassy and jiggly, and show visible bubbles on the surface. Over-fermentation can lead to a dense, gummy crumb, while under-fermentation results in a tight, heavy crumb. Learn to recognize these cues.

5. 5. Shape Your Loaf with Tension: Proper shaping creates surface tension, which helps the loaf hold its structure and rise upwards in the oven. Avoid over-handling or degassing the dough too much during shaping. Aim for a tight skin on the outside of your dough ball or batard. This tension is what allows the loaf to expand beautifully.

6. 6. Proof Your Dough Correctly (Second Rise): This final rise, often done in a banneton in the fridge, is crucial. Again, don’t just follow the time. A perfectly proofed dough will spring back slowly when gently poked with a floured finger, leaving a slight indentation. If it springs back quickly, it’s under-proofed (dense). If it doesn’t spring back at all, it’s over-proofed (can collapse).

7. 7. Bake with Steam and High Heat: High heat and steam in the initial phase of baking are essential for a good oven spring and a crispy crust. The steam keeps the crust soft, allowing the dough to expand fully before the crust sets. Use a Dutch oven or a baking stone with a pan of water for steam.