Acme Sourdough Bread Recipe: Dutch Oven Crust With Tangy Open Crumb

This Acme sourdough bread recipe delivers the iconic Dutch oven crust and signature tangy open crumb that makes every slice unforgettable. The secret lies in precise fermentation timing and high-heat baking that creates that coveted crispy exterior while keeping the interior airy and flavorful.

I've perfected this method over years of baking, ensuring even home bakers can achieve artisanal results without specialized equipment.

The process begins with creating a robust sourdough starter (or using a well-established one), followed by careful dough development through stretch-and-folds. Bulk fermentation lasts 5-6 hours at room temperature, with a final proof in the refrigerator overnight for enhanced flavor.

The Dutch oven method captures steam during baking, producing that legendary crust while maintaining an open, airy crumb structure.

What you'll end up with is a loaf of sourdough that's crisp on the outside, tender on the inside, and packed with that distinctive tangy flavor that defines Acme-style bread. The crust develops deep color and satisfying crunch, while the crumb remains open and inviting.

This recipe transforms your kitchen into a bakery, delivering professional-quality bread with just a few key techniques.

Whether you're feeding a crowd or baking for yourself, this recipe scales beautifully while maintaining perfect texture. The method accommodates both beginners and experienced bakers, with clear instructions for each critical step. Let's get started on creating your perfect loaf of Acme-style sourdough bread.

Ingredients for acme sourdough bread

Precision ingredients for artisanal sourdough with legendary Dutch oven crust and signature tangy crumb.

The sourdough starter is your foundation—it must be 100% hydration and actively bubbling with yeast activity. For optimal results, maintain your starter on a consistent feeding schedule (I use whole grain flour and organic cane sugar) and store it in a glass jar at room temperature. If you're starting fresh, allow 5-7 days of daily feedings to establish a robust culture. King Arthur or Bobs Red Mill bread flours are ideal for their high protein content, but Pillsbury Best works in a pinch. The butter should be cold and cubed—this ensures maximum fat content in the crust without melting during bulk fermentation. Whole milk adds tenderness and improves oven spring, but 2% or plant-based milk can substitute if needed.

No bread flour? All-purpose flour plus 1 tbsp vital wheat gluten mimics the protein structure. Short on starter? Use 0.25 cup commercial yeast as a backup (though flavor will differ). The sugar amount is minimal—reduce to 0.25 tsp if you prefer less sweetness. For salt, Diamond Crystal measures differently than Morton (use 1.25 tsp Morton if substituting). The cornmeal layer in the Dutch oven creates that iconic crispy bottom crust—don't skip it. Need to adjust hydration? Add ice water 1 tbsp at a time during final mix to achieve proper dough consistency (similar to wet Play-Doh but slightly tacky).

Store your starter in the fridge between uses—it'll last 1-2 weeks if fed weekly. Flour keeps indefinitely in airtight containers in a cool, dark place. The dough can be shaped and refrigerated overnight for enhanced flavor development (this is my preferred method). For long-term storage, wrap cooled loaves in beeswax wrap and freeze for up to 3 months. The Dutch oven retains heat exceptionally well—preheat it for 30 minutes before baking to achieve that professional bakery crust. Leftovers? Toast within 2 days for maximum freshness—sourdough stales faster than regular bread.

Step-by-step instructions for Acme sourdough bread

Mastering this recipe delivers a signature Dutch oven crust with an open, tangy crumb every time.

In a large mixing bowl, combine the 0.5 cup Active Sourdough Starter, 4 cups All-Purpose Flour, 1 cup Unbleached Bread Flour, 0.5 tsp Granulated Sugar, and 1.5 tsp Kosher Salt. I use a silicone spatula to mix these dry ingredients thoroughly, ensuring the salt and sugar are evenly distributed throughout the flour. This prevents flavor pockets and promotes even fermentation.

Create a well in the center and add the 0.5 cup Whole Milk and 0.5 oz Unsalted Butter. The butter should be cold and cubed to help create a tender crumb. Gradually add 1.5 cups Cold Water while mixing with your hands or a dough whisk. The dough will be shaggy at first, but don't be tempted to add more water—this is normal. The gluten needs time to develop.

Knead the dough on a lightly floured surface for 8-10 minutes until it becomes smooth and elastic. You'll know it's ready when it springs back slowly when poked. The dough should feel slightly tacky but not sticky. If it's too dry, add 1 tablespoon of the Cold Water at a time until it reaches the perfect consistency. This initial kneading is critical for developing the gluten structure that gives sourdough its signature chew.

Place the dough in a lightly oiled bowl, cover it with a damp kitchen towel, and let it rest at room temperature for 1 hour. After this initial rest, perform a series of folds every 30 minutes for a total of 2 hours. To fold, wet your hands slightly, grab one side of the dough, stretch it upward, and fold it over itself. Rotate the bowl and repeat this process on all four sides. This technique strengthens the gluten network and creates a more open crumb structure.

During bulk fermentation, the dough should increase in volume by about 50-75%. You'll notice bubbles forming on the surface and a slight tangy aroma developing. The ideal temperature for this process is between 75-78°F. If your kitchen is cooler, allow an extra 30-60 minutes. The dough is ready when it passes the "poke test"—when you gently press your finger into the dough, it should spring back slowly, leaving a slight indentation.

Turn the dough out onto a lightly floured surface and gently shape it into a round loaf. I like to use the "stretch and fold" method for shaping—grab the dough from one side, stretch it upward, and fold it over itself, rotating the dough as you work. This creates surface tension that helps maintain the shape during proofing. Place the shaped dough seam-side down in a bowl, cover it, and refrigerate for 12-16 hours. Cold fermentation slows yeast activity, allowing for better flavor development and a more controlled rise.

After refrigeration, the dough should have risen noticeably but not doubled in size. The cold proofing also enhances the tangy flavor characteristic of Acme sourdough. Remove the dough from the fridge and let it sit at room temperature for 1 hour before baking. This final warm-up ensures even baking and a better oven spring. Preheat your oven to 450°F with a Dutch oven inside for 45 minutes. The Dutch oven will get extremely hot—use oven mitts when handling it.

Carefully transfer the dough to a piece of parchment paper. Using a sharp knife or razor, score the top of the dough with a ½-inch deep crosshatch pattern. This allows the bread to expand properly and creates those beautiful crust patterns. Dust the Dutch oven with 0.25 cup Cornmeal and invert the parchment paper with the dough into the hot Dutch oven. Sprinkle the top with a little more cornmeal to prevent sticking.

Bake the bread, covered, for 30 minutes. Then remove the lid and bake for another 15-20 minutes until the crust is deep golden brown and the internal temperature reaches 205-210°F. The bread should sound hollow when tapped on the bottom. If the crust isn't brown enough, return it to the oven for an additional 5 minutes. The steam from the Dutch oven creates that signature crispy crust while the open crumb develops.

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. The bread should have a crisp, caramelized crust with a tangy, open crumb that's slightly chewy. Slice it thickly to enjoy the full flavor experience—each bite should deliver that perfect balance of tangy sourdough flavor and airy texture.

Flavor customization for this acme sourdough bread

Tangy vs. Mild

Balance the signature tang by adjusting your starter's feeding schedule. For a milder loaf, feed your starter with equal parts flour and water (1:1 ratio) and let it sit 24 hours before using.

For maximum tang, feed with whole grain flour and use the starter at its peak activity (right after feeding). I find feeding my starter with rye flour adds an extra depth of sourness that's perfect for Acme-style bread. 💛

Sweet Variations

Add 1-2 tablespoons of honey or maple syrup to the dough for a subtle sweetness that pairs beautifully with the tang. For a cinnamon-raisin twist, fold in 1 teaspoon ground cinnamon and ¼ cup raisins during the final shaping.

This works especially well when serving with butter or jam. The sweetness enhances the bread's complexity without overpowering its natural flavor.

Herb-Infused Crust

Elevate your crust by incorporating fresh herbs into the dough or topping. For a rosemary-garlic version, mix 1 tablespoon finely chopped rosemary and 1 teaspoon minced garlic into the flour before adding liquids.

For a poppy seed loaf, sprinkle 1 tablespoon poppy seeds on top before baking. These additions add aromatic depth that complements the bread's tangy profile beautifully.

Whole Grain Boost

Replace 1 cup of all-purpose flour with whole wheat flour or spelt flour for added nutrition and a nuttier flavor. For a seeded loaf, mix in 2 tablespoons of sesame seeds or sunflower seeds during the final knead.

These variations add texture and visual appeal while keeping the bread's signature open crumb. Just be mindful—whole grains absorb more water, so you may need to add 1-2 tablespoons extra water to maintain proper dough consistency.

Cheese-Enhanced Dough

Add ½ cup grated Parmesan cheese or sharp cheddar to the dough for a savory twist. The cheese melts slightly during baking, creating pockets of rich flavor. For a goat cheese variation, crumble ¼ cup soft goat cheese into the dough and fold it in gently.

These cheesy versions pair exceptionally well with soups or charcuterie boards. The cheese also enhances the bread's chewiness, making each bite more satisfying. ✨

Seasonal Spice Blends

Experiment with seasonal spices to create unique flavor profiles. For fall, add ½ teaspoon pumpkin pie spice or cinnamon and nutmeg. In winter, try cardamom and orange zest for a festive twist.

For spring, incorporate fresh thyme and lemon zest. These spice blends transform your sourdough into a versatile loaf that adapts to any season's flavors while maintaining its signature tang and texture.

Frequently asked questions