75 Percent Hydration Sourdough Bread Recipe: Open Crumb Artisan Loaf in 12 Hours

A 75% hydration sourdough bread recipe transforms your kitchen into an artisan bakery with just 12 hours of hands-off time. The secret lies in this precise hydration level—balancing moisture and structure for an open crumb texture that's light yet substantial.

I've perfected this method after years of experimentation, where the difference between a dense loaf and a cloud-like interior comes down to proper bulk fermentation and gentle shaping.

This recipe delivers restaurant-quality results without specialized equipment. The dough's higher hydration creates a more open crumb structure and deeper flavor development during fermentation.

We'll use a simple mix of flour, water, salt, and your active starter, with careful attention to timing that ensures optimal gluten development without overworking the dough.

By the time you pull that golden-brown loaf from the oven, you'll have achieved an artisan-quality bread with crispy crust and an airy interior that crumbles beautifully. The Dutch oven method creates steam for even browning, while proper scoring ensures controlled expansion.

This is the kind of bread that makes toast, sandwiches, and charcuterie boards feel like special occasions.

Perfect for beginners eager to master sourdough or experienced bakers looking to refine their technique. The same method works for whole grain variations or seed additions—just adjust hydration slightly. Let's get started on creating your perfect loaf from scratch.

Ingredients for 75 hydration sourdough bread

Four key ingredients and precise timing create your perfect artisan loaf in just 12 hours.

The flour makes all the difference here. King Arthur or Caputo Tipo 00 are my go-tos—their high protein content develops that perfect open crumb. If you're using whole grain flour, reduce hydration by 5% to account for extra moisture. Your starter should be at peak activity—look for bubbles that nearly double its size in 4-8 hours. For water, filtered or dechlorinated is ideal, but tap water works in a pinch. The salt? Diamond Crystal dissolves more easily than Morton, so you get even flavor distribution. Pro tip: weigh your ingredients for precision—this isn't a recipe where eyeballing works.

No active starter? King Arthur's sourdough starter kit is foolproof, or you can culture your own using whole wheat flour and water over 5-7 days. Short on time? Instant yeast at 0.25% of flour weight works as a backup (though true sourdough flavor will differ). For the Dutch oven step, rice flour creates the crispest crust—it toasts beautifully. The olive oil isn't just for flavor; it prevents sticking when scoring. Want extra crunch? Brush the baked loaf with melted butter after baking. And if you're nervous about scoring, practice on a separate dough scrap first—the confidence boost is real.

Your starter can live in the fridge for up to 2 weeks, but feed it weekly to keep it alive. The dough itself keeps in the fridge for 24 hours before baking—perfect for overnight proofing. For longer storage, wrap the cooled loaf in a cotton towel and store at room temperature for 3-4 days. Freeze slices for up to 3 months by wrapping individually in parchment. The best part? This method makes enough dough for two loaves—bake one now, freeze the other for next week's toast. Trust me, your future self will thank you.

Step-by-step instructions for 75% hydration sourdough bread

This method delivers a beautifully open crumb structure with perfect oven spring in just 12 hours.

In a large mixing bowl, combine the 500 g unbleached all-purpose flour and 125 g active sourdough starter. I like to use a wooden spoon for this initial mixing to avoid overdeveloping the gluten prematurely. Create a well in the center and pour in the 375 g water and 10 g diamond crystal kosher salt. Let it sit for 5 minutes while the salt dissolves completely.

After the salt dissolves, add the 1 tbsp extra-virgin olive oil and mix vigorously with your hands for 5 minutes. The dough will feel shaggy at first, but keep going until it begins to come together. You're looking for a dough that's smooth but still slightly tacky—this is perfect for 75% hydration. The olive oil helps create that signature tender crumb while preventing excessive gluten development.

Cover the bowl loosely with plastic wrap or a damp towel and let it ferment at room temperature (70-72°F) for 4-5 hours. I check the dough every 30 minutes during this time—it should rise by about 30-50% and develop bubbles along the surface. The edges should pull away slightly from the bowl, but it shouldn't be fully doubled.

After 4 hours, perform a windowpane test: wet your fingers and gently press the dough between them. If it stretches thin enough to see light through without tearing, it's ready. If not, let it ferment another 30-60 minutes. This bulk fermentation is where the magic happens—the dough develops its signature open crumb structure and complex flavor. Don't rush this step, even if you're eager to shape the loaf.

Lightly dust a clean surface with 2 tbsp rice flour and turn out the dough. Gently shape it into a round boule by pulling the edges toward the center and tucking them underneath. Rotate the dough as you work to maintain even tension. The goal is to create surface tension that will help the loaf expand beautifully in the oven.

Place the shaped boule seam-side up in a lightly oiled bowl, cover, and let it proof at room temperature for 1-2 hours. It should rise by about 50%—look for a rounded top with visible bubbles. The dough should feel springy when pressed gently. If your kitchen is cool, you might need to extend this proofing time slightly. This final proofing stage is crucial for that signature open crumb we're after.

Preheat your Dutch oven with lid in a 475°F oven for 45 minutes. While it heats, transfer the dough to a piece of parchment paper dusted with 2 tbsp cornmeal. Score the top with a sharp razor blade or lame, making a ½-inch deep cut down the center. This prevents the dough from bursting open unpredictably and creates that beautiful ear we all love.

Carefully transfer the scored dough to the hot Dutch oven and bake covered for 20 minutes. Then remove the lid and bake uncovered for another 20-25 minutes until the bread reaches an internal temperature of 205-210°F and has a deep golden brown crust. The bread is done when it sounds hollow when tapped on the bottom. For extra shine, brush the crust with water and sprinkle 1 tbsp semolina flour just before removing from the oven.

Remove the bread from the Dutch oven and let it cool on a wire rack for at least 1 hour before slicing. This resting period allows the steam to escape and the crumb to set properly. If you cut into it too soon, you'll get a gummy texture instead of that beautiful open crumb structure we worked so hard to create.

The result should be a loaf with a crisp crust that gives way to an airy, open crumb filled with holes of varying sizes. Each slice should have that perfect balance of chew and tenderness, with a subtle tang from the sourdough starter. Store any leftovers wrapped in a bread bag at room temperature for up to 3 days, or freeze for longer storage. This bread is best enjoyed fresh, straight from the oven.

Health benefits of this recipe

Digestive Benefits

Sourdough's natural fermentation process breaks down gluten proteins, making it easier to digest than regular bread for many people. The lactic acid bacteria in your starter create a prebiotic environment that supports gut health—think of it as a natural probiotic boost.

I've noticed my digestion improves noticeably when I replace store-bought bread with homemade sourdough, especially after meals. 💪

Low Glycemic Impact

This 75% hydration sourdough has a lower glycemic index than most commercial breads due to its fermentation process. The long proofing time allows the starches to partially break down, creating a slower release of glucose into your bloodstream.

I recommend pairing it with protein (like eggs or nut butter) for an even more balanced blood sugar response. The open crumb structure also means more air space, which naturally reduces calorie density per slice.

Nutrient Retention

The fermentation process actually increases the availability of certain nutrients in your flour. B vitamins become more bioavailable, and the bread retains more of the original minerals from the flour. For example, whole grain versions (if you add them) will have even higher levels of magnesium and zinc.

I always use King Arthur flour because their milling process preserves more nutrients than many conventional brands.

Natural Preservation

The acidic environment created by fermentation acts as a natural preservative, keeping your bread fresh longer than regular bread. This means fewer chemicals needed to maintain freshness. I've had loaves stay fresh for up to 5 days at room temperature when properly stored in a cotton towel.

The tangy flavor also helps mask staleness better than neutral breads.

Gluten Sensitivity Note

While sourdough is often easier to digest than regular bread, it's not gluten-free. The fermentation process does reduce gluten content, but it's still not safe for those with celiac disease. However, people with mild gluten sensitivities often tolerate sourdough better than conventional bread.

If you're sensitive, try a small piece first and monitor your reaction. The 75% hydration helps create a lighter texture that's gentler on digestion than denser loaves.

Energy Sustaining

The combination of complex carbohydrates from the flour and the slow-digesting properties of fermented bread makes this an excellent choice for sustained energy. The open crumb structure also means you get more air per bite, which can help with portion control.

I always keep a loaf on hand for pre-workout meals—the energy release is much steadier than with white bread. The subtle tang from the starter also helps balance blood sugar spikes better than sweet commercial breads.

Frequently asked questions