Prep Time 18 hours hrs 30 minutes mins
Cook Time 45 minutes mins
Resting Time 1 hour hr
Total Time 20 hours hrs 15 minutes mins
High hydration doughs feel sticky and loose at first, so resist the urge to add extra flour and instead work quickly with slightly wet hands and a dough scraper to handle it. Temperature is crucial to fermentation speed: a warmer kitchen will shorten bulk and proof times, while a cooler one will lengthen them, so rely on dough appearance (bubbly, airy, and jiggly) more than the clock. A long cold retard in the fridge not only improves flavor and makes scoring easier, it also helps the dough firm up, which is useful with high hydration recipes. Steam is key to a crisp, shiny crust, so keep the Dutch oven covered for the first part of the bake, and if not using a Dutch oven, add steam by spraying the oven walls or placing a pan of hot water on a lower rack. Always let the bread cool fully before slicing so the crumb can set; cutting too early can make the interior gummy even if it’s fully baked.