King Arthur Artisan Sourdough Bread Recipe: Fluffy Crust, Open Crumb Magic

This King Arthur artisan sourdough bread recipe delivers the perfect balance of a fluffy crust and that coveted open crumb structure—no shortcuts, just time-honored technique. The secret lies in patient fermentation and King Arthur's high-protein flour, which creates an ideal crumb while maintaining a crispy exterior.

I've baked dozens of loaves to perfect this method, ensuring every slice has that signature tang and airy texture.

What sets this recipe apart is the focus on proper dough handling—stretch-and-folds during bulk fermentation develop gluten for that signature oven spring, while careful shaping creates the classic open crumb structure.

The recipe includes clear instructions for maintaining your sourdough starter, so you'll never be left guessing about feedings or readiness. King Arthur's flour works beautifully here, offering just the right balance of protein and texture.

By the time your loaf emerges from the Dutch oven, you'll have a bread with a golden, crispy crust and an interior filled with those signature open holes—proof of proper fermentation and gluten development.

The aroma alone will transform your kitchen into a bakery, and the flavor? A perfect balance of tangy sourdough with a subtle sweetness from the slow fermentation process.

This recipe scales perfectly for home bakers, whether you're making one loaf or feeding a crowd. The instructions include troubleshooting tips for common issues like dense crumb or poor oven spring, so you'll get consistent results every time. Ready to bake bread that rivals your favorite artisanal bakery?

Ingredients for artisan sourdough bread recipe king arthur

King Arthur flour and a lively starter—these are your golden tickets to artisanal sourdough perfection.

King Arthur Artisan Sourdough Flour is non-negotiable here—its high protein content gives you that signature open crumb structure. Buy it online or from specialty baking stores—it's worth the investment. Your sourdough starter should be at its peak, with bubbly activity and a tangy aroma. If yours is sluggish, feed it 12-24 hours before baking. The butter adds richness, so use European-style if possible—it has a higher fat content. For the water, room temperature is key; cold water slows fermentation, and hot water can kill your starter.

No King Arthur flour? Bread flour with 12-14% protein works in a pinch, but expect a slightly tighter crumb. Your starter not ready? Instant yeast at half the starter amount can bail you out, though the flavor won't be quite the same. Salt substitutes? Maldon flakes or sea salt work beautifully. For scoring, a lame is ideal, but a sharp knife or razor blade will do. The cornmeal isn't just for dusting—it adds a subtle sweetness to the crust. And if you don't have a Dutch oven, a baking stone with a metal bowl inverted over it mimics the steam effect.

This dough is a patient's game—ferment for 8-12 hours at room temp or overnight in the fridge. The butter should be cold when you begin, but it'll soften during mixing. Store your starter in the fridge between uses, feeding it weekly. The baked loaf keeps well for 3-4 days at room temperature or up to a week in the freezer. For reheating, wrap slices in a damp towel and warm in a 350°F oven for 5-10 minutes—nothing like fresh bread, but close!

Step-by-step instructions for artisan sourdough bread with King Arthur flour

Transform humble ingredients into a loaf with a crackling crust and airy interior—this method delivers every time.

In a large mixing bowl, combine the 5 cups King Arthur Artisan Sourdough Flour, 1 cup Active Sourdough Starter, 3.5 cups Filtered Water, 2 tsp Diamond Crystal Kosher Salt, and 1 tbsp Honey or Maple Syrup. Use a wooden spoon or dough whisk to stir until the dry ingredients are fully incorporated and you have a shaggy, sticky dough.

This high-protein flour creates the perfect structure, while the active starter provides that signature tang. The honey adds subtle sweetness that balances the acidity. Let the dough rest for 5 minutes—this initial hydration period helps the flour absorb moisture evenly. After resting, knead by hand for 8-10 minutes until the dough becomes smooth and elastic, pulling away from the sides of the bowl.

Real talk: The dough will be stickier than most wheat doughs, but that's normal. If it feels too wet after kneading, add 1 tablespoon of flour at a time until it's just manageable. Cover the bowl with a damp towel and let it rest at room temperature for 1 hour, or until it nearly doubles in size. This first bulk ferment develops flavor and strengthens the gluten.

Turn the dough onto a lightly floured surface and gently shape it into a round boule. I like to use the "stretch and fold" method here: stretch one side of the dough toward you and fold it over, then rotate the boule 90 degrees and repeat. Do this 4-5 times total, then let it rest for 10 minutes before final shaping.

For the final shape, create a taut surface by pulling the dough from the bottom up and tucking it underneath. This creates the classic round shape with a smooth, even surface. Place the shaped boule seam-side down in a bowl dusted with 0.25 cup Cornmeal, cover with a damp towel, and refrigerate for 12-16 hours. This cold proofing slows fermentation, allowing flavors to develop fully and creating that signature open crumb structure.

Here's the thing—don't skip this cold proof. It's what transforms good bread into exceptional bread. The slow fermentation in the fridge enhances the sourdough flavor and creates that perfect oven spring when baked.

Place the 1 whole Dutch Oven (with lid) in a 475°F oven and preheat for 1 hour. This step is crucial—it ensures your Dutch oven is scorching hot when you add the dough, which creates that iconic crust. While it preheats, prepare your workspace by placing the 1 cup Ice Cubes in a small bowl and having the 1 whole Wooden Peel and 1 whole Lame or Razor Blade ready.

After the hour, carefully remove the Dutch oven using oven mitts. It should be extremely hot—you'll see steam when you open the lid. Lightly dust the bottom with additional cornmeal if needed, then transfer the cold dough (still in its bowl) onto the peel. Flip the dough into the hot Dutch oven, gently lifting it to avoid deflating the shape.

This is the moment that matters: Immediately cover the Dutch oven with its lid. The trapped steam creates the perfect environment for oven spring—the dramatic rise that gives sourdough its signature height. Bake for 30 minutes covered, then remove the lid and bake for another 15-20 minutes until the bread reaches an internal temperature of 205-210°F and develops a deep golden brown color.

Remove the bread from the Dutch oven and carefully transfer it to the preheated 1 whole Baking Stone or Steel using the wooden peel. Immediately score the top with the 1 whole Lame or Razor Blade in a single, confident motion—this prevents the bread from bursting open unevenly and creates that beautiful ear-like opening.

Return the bread to the oven and bake for an additional 5-10 minutes until the crust is deep golden brown and crisp. The stone retains heat perfectly, ensuring even baking and that glorious crust. When done, transfer the bread to a wire rack to cool completely—at least 1 hour—before slicing. This resting period allows the crumb to set properly and prevents a gummy texture.

Here's what you're aiming for: A loaf with a crackling crust that shatters when you tap it, an open crumb structure with even holes, and a flavor that balances tangy sourdough with subtle sweetness. Each slice should be tender yet chewy, with that perfect balance of airiness and structure that makes artisan sourdough worth every minute of effort.

Troubleshooting this dish

Dense Crumb Fix

If your loaf turns out dense instead of airy, your fermentation likely didn't develop enough gluten. Try extending bulk fermentation by 2-3 hours at room temperature, or increase your starter amount to 1.5 cups for the next batch.

I also recommend doing more stretch-and-folds during bulk fermentation—4 sets of 4 folds each spaced 30 minutes apart builds stronger gluten structure. 🌟

Poor Oven Spring

For that dramatic rise, your Dutch oven needs to be scorchingly hot when you add the dough. Preheat it with the lid on for at least 1 hour at 475°F.

If your loaf isn't rising properly, try adding 1 tbsp vital wheat gluten to your flour mix for extra strength. Also, ensure your dough is fully proofed before baking—it should spring back slowly when poked with your finger. ⚡

Sticky Dough Nightmare

Sourdough dough is naturally sticky, but if it's impossible to handle, you might need to adjust hydration. Reduce water by ¼ cup next time, or add ½ cup vital wheat gluten to absorb excess moisture. For shaping, use a well-floured surface and a dough scraper to lift sticky sections.

I keep a spray bottle of water handy to dampen my hands—just enough moisture prevents sticking while keeping the dough pliable. 💧

Pale, Soft Crust

A pale crust means your oven wasn't hot enough or your dough lacked proper tension. Bake at 475°F the entire time, and steam your bread by placing a metal bowl of boiling water in the oven during the first 10 minutes of baking.

For scoring, use a sharp lame or razor blade—press firmly but confidently to create a clean cut that directs oven spring. A properly scored loaf will develop a crisp, golden crust. 🔥

Uneven Baking

If your loaf bakes unevenly, your oven temperature might fluctuate. Use an oven thermometer to verify your 475°F setting—many home ovens run 25-50°F hotter or cooler than displayed.

For even heat distribution, place your baking stone on the middle rack and avoid opening the oven door during the first 20 minutes of baking. Rotate your Dutch oven halfway through if needed. 🌡️

Flat Loaf After Baking

A flat loaf usually means weak gluten structure or insufficient proofing. Strengthen your dough by doing 6 sets of stretch-and-folds during bulk fermentation, spaced 30 minutes apart. Also, ensure your dough is fully proofed before baking—it should have risen 50-75% above its original height after cold proofing.

If your loaf still falls, try shaping it into a batard (oval) instead of a boule for better support. 💪

Frequently asked questions