65% Hydration Sourdough Bread Recipe: Open Crumb Artistry With Tangy Depth

Mastering a 65% hydration sourdough bread recipe transforms your kitchen into a bakery—crisp crusts, open crumb, and that signature tangy depth. The secret lies in precise hydration control and patient fermentation, where dough develops complex flavors and structure.

This recipe balances traditional techniques with modern efficiency, ensuring professional results even for beginners.

With bread flour and a well-maintained starter, you’ll achieve an airy, open crumb structure without sacrificing flavor. The dough’s higher hydration creates a sticky yet manageable texture, perfect for shaping and scoring. Cold fermentation overnight enhances flavor development, while a high bake temperature (475°F) delivers that coveted crust.

By the time you pull this loaf from the oven, you’ll have a golden, crackling crust with an open, lace-like crumb—each slice revealing layers of chewy texture and tangy depth. The aroma alone will have everyone asking for seconds. This is sourdough at its finest, built on science and tradition.

Whether you’re baking for a crowd or perfecting your craft, this recipe delivers restaurant-quality results at home. Let’s get started—your first loaf is just a few steps away.

Ingredients for 65 hydration sourdough bread

Six essential ingredients transform your kitchen into a sourdough bakery.

The bread flour is non-negotiable here—look for high-protein content (12-14%) at stores like King Arthur Flour or Bob's Red Mill for that perfect open crumb. Your sourdough starter should be active with visible bubbles; if it's sluggish, feed it 1:1:1 (flour:water:starter) by weight 12-24 hours before baking. King Arthur's sourdough mix is a great backup if you're new to starters. Water temperature matters too—room temp (70-75°F) is ideal, but not boiling. The sea salt should be fine grain; Diamond Crystal is my go-to, but any kosher salt works.

No bread flour? All-purpose flour plus 1 tbsp vital wheat gluten per cup gets you close, though texture won't be identical. Starter too weak? Add 1 tsp sugar or honey to feed it, but return to unsweetened for baking. Olive oil can be swapped for neutral oil like avocado if you prefer, though it lacks that fruity depth. Cornmeal substitutes? Rice flour or semolina work for dusting, but cornmeal gives that signature texture. The ice water is key for final shaping—don't skip it, even if your kitchen isn't humid.

Starter can be refrigerated for 1-2 weeks between uses, but bring it to room temp before mixing. Dough keeps 24 hours refrigerated before shaping, but flavor peaks after 8-12 hours cold fermentation. For scoring, use a razor blade or lame—anything sharp enough to cut cleanly. Leftovers? Toast within 2 days for best texture, or freeze slices for 3 months. The crust stays crisp for 2 days at room temp if wrapped tightly.

Step-by-step instructions for crafting 65% hydration sourdough bread

Let's create a loaf with an open crumb structure and deep tangy flavor—this is where the magic happens.

In a large mixing bowl, combine the 3.5 cups bread flour and 1 cup active sourdough starter. Create a well in the center and pour in the 2.3 cups water and 0.75 tsp sea salt. Let the flour absorb the liquid for 10 minutes—this resting period helps the gluten develop more evenly.

After resting, use a dough whisk or your hands to gently mix until a shaggy dough forms. Add the 1 tbsp olive oil and continue mixing until the dough comes together. It should be sticky but cohesive, with no dry spots. Avoid overworking the dough at this stage—we're building structure, not strength. The dough should feel slightly tacky but not wet, with a few small bubbles forming on the surface.

Lightly oil a large bowl and transfer the dough to it. Cover with a damp kitchen towel or plastic wrap and let it ferment at room temperature for 4-6 hours. During this time, the dough should rise by about 50% and develop small bubbles throughout. I like to do this on the countertop where it's naturally warm—this environment encourages better fermentation.

After 2 hours, perform your first set of stretch-and-folds. Wet your hands with water and gently stretch one side of the dough while folding it over itself. Rotate the bowl and repeat this process 4-5 times total. This technique strengthens the gluten network without overworking the dough. The dough should feel smoother and more elastic after each fold. If it's too sticky, let it rest for 10 minutes before continuing.

After bulk fermentation, the dough should be bubbly and have risen noticeably. Turn it out onto a lightly floured surface and gently shape it into a loose round. I like to use the "stretch and fold" method again here—gently stretch the dough from the edges toward the center, then fold it over itself. This helps create the open crumb structure we're after.

Once shaped, place the dough seam-side up in a well-floured banneton or bowl. Cover with plastic wrap and refrigerate for 12-16 hours. The cold slows fermentation and allows the gluten to relax, which is crucial for that beautiful open crumb. If your kitchen is warm, you might need to reduce this time to 8-10 hours to prevent overproofing.

Preheat your oven to 450°F with a Dutch oven inside for 45 minutes. While the oven heats, turn the dough out onto a piece of parchment paper dusted with 0.25 cup cornmeal. Use a sharp razor blade or lame to score the dough in a decorative pattern—this allows the bread to expand properly and creates that beautiful open crumb structure.

Carefully transfer the scored dough (with parchment) into the hot Dutch oven. Bake covered for 20 minutes, then remove the lid and bake for another 20-25 minutes until the bread reaches an internal temperature of 210°F and has a deep golden brown crust. The bread should sound hollow when tapped on the bottom. If the crust browns too quickly, tent with foil to prevent burning.

Remove the bread from the Dutch oven and let it cool on a wire rack for at least 1 hour. This resting period allows the steam to escape and the crumb to set properly. I know it's tempting to slice into that warm, crusty loaf immediately, but patience here ensures that perfect open crumb structure we worked so hard to create.

Once cooled, slice the bread and admire that beautiful open crumb with its tangy depth of flavor. The exterior should be crisp and golden, while the interior reveals an airy, irregular crumb structure. This is the hallmark of a well-made 65% hydration sourdough—each bite should deliver that perfect balance of chewiness and airiness with a satisfying tang from the active starter.

Make-ahead tips for 65 hydration sourdough bread

Dough Prep Ahead

Mix your dough up to 24 hours before shaping—just store it in an airtight container lined with plastic wrap in the fridge. This cold storage slows fermentation, giving you more control over timing.

I like to label containers with the date to track freshness. The dough will develop deeper flavor during this rest, but avoid exceeding 48 hours or it may overproof. 💫

Cold Fermentation Mastery

For the 12-16 hour cold proof, divide your shaped dough into two separate bannetons if baking multiple loaves. This prevents overcrowding and ensures even proofing. I use floured linen towels instead of plastic wrap for better breathability.

If your kitchen is warm, reduce time to 8-10 hours—overproofing leads to collapsed loaves. A thermometer helps track your fridge's temp (ideal: 38-42°F).

Scoring & Baking Prep

Prep your Dutch oven while the oven preheats—this saves critical minutes. Place parchment paper on the counter and dust with cornmeal (or semolina) for easy transfer. Score your dough just before baking—the tension from scoring releases during the initial steam phase.

I keep a sharp razor blade and baking spray nearby for quick cleanup. Never score too deeply—¼ inch cuts are perfect for expansion.

Freezing for Later

For long-term storage, bake your loaf, cool completely, then wrap tightly in plastic wrap followed by foil. Freeze for up to 3 months. Thaw at room temp for 2-3 hours before toasting.

The crust stays crisp, while the crumb remains moist. I freeze unsliced loaves—slicing releases moisture that turns bread gummy. For quick use, freeze individual slices wrapped in parchment for 1 month.

Batch Baking Tips

Double the recipe for two loaves—just divide the dough evenly after bulk fermentation. Use two bannetons of the same size for consistent proofing. I bake both loaves simultaneously in the Dutch oven (one after the other) to maintain oven heat.

For three loaves, bake one at a time—your oven won't recover heat fast enough for perfect crusts. Always rotate pans halfway through baking for even browning. 🔥

Reviving Stale Bread

Slice stale sourdough and toast at 400°F for 5-7 minutes to revive crispness. For sandwiches, brush slices with garlic butter or olive oil before toasting. I also revive stale bread by wrapping it in a damp towel and microwaving for 20 seconds—this steams the crumb without drying it out.

Store revived bread in a paper bag at room temp for up to 2 days to maintain freshness.

Frequently asked questions