Rustic Walnut Rosemary Sourdough

Why This Rustic Walnut Rosemary Sourdough Works

During the first rest, the flour and water sit together so the flour can drink up the water. The dough starts out rough, but as it rests, the gluten in the bread flour and whole wheat flour lines up and the dough becomes smoother and stretchier without much kneading. When the sourdough starter and salt go in, the starter wakes everything up and the dough starts to puff slowly, while the salt keeps it from getting too sticky and loose.

Over the two hours of stretch and folds, the dough keeps tightening and building strength. Each time it is stretched and folded, the gluten strands stack on top of each other, so the dough can later hold the walnuts and rosemary without tearing. Once the nuts and herbs are folded in, they stay suspended instead of sinking or clumping.

During the long room rise and then the cold night in the fridge, the dough keeps building tiny gas pockets and firms up. By the time it hits the hot Dutch oven, the loaf has enough strength to spring up, and the steam trapped by the lid lets it rise before the crust sets hard. The result is a loaf with a chewy, open crumb and a thick, crisp crust that holds in moisture.

Mistakes To Avoid

Letting the dough skip the first 30-minute rest after mixing flour and water leaves the flour not fully hydrated, so the dough stays tight and tears easily during stretch and folds. This makes it hard to build structure, and the finished loaf bakes up flatter and denser instead of airy.

Adding the walnuts and rosemary too early, before the main stretch-and-folds, means the sharp nut edges and herb pieces keep cutting through the gluten as it forms. The dough never gets strong and stretchy, so the loaf spreads out in the oven and the crumb turns out uneven with heavy patches.

Rushing the bulk rise and shaping while the dough is still under-proofed keeps the dough tight and springy. In the oven it can burst in random spots instead of opening at the score line, and the inside stays a bit gummy even when the crust looks done.

Skipping the overnight chill or cutting it very short leaves the dough warm and loose when it goes into the Dutch oven. The loaf then sticks more easily, spreads instead of rising tall, and the cuts on top don’t hold a nice shape.