Australian Sourdough Bread Recipe: Crusty Crumb with Tangy Depth in 24 Hours

This Australian sourdough bread recipe delivers the iconic crusty crumb and tangy depth that defines Aussie bakery traditions—all in just 24 hours.

The secret lies in high hydration dough and a carefully maintained starter, creating that signature open crumb structure and complex flavor profile that sets it apart from standard sourdough. I’ve perfected this method over years of baking, ensuring every loaf develops the perfect balance of chewiness and airiness.

The process begins with a robust starter, fed daily to maintain its vitality, before moving to a long bulk fermentation that develops flavor and structure.

Shaping and scoring techniques are critical—this isn’t just any sourdough; it’s a bread that captures the essence of Australian artisan baking, with a crisp, golden crust that gives way to an open, airy crumb.

The tangy depth comes from the starter’s activity, while the texture is all about hydration and time.

What you’ll achieve is a loaf with a crusty exterior and a tender, open crumb that’s impossible to resist. The flavor is rich and slightly sour, with a depth that comes from the long fermentation and high-quality flour.

This isn’t just bread—it’s a centerpiece for any table, whether served fresh with butter or toasted for breakfast. The method is straightforward, but the results are undeniably professional.

Ready to bake? This recipe includes everything you need, from starter maintenance to baking tips, so you can achieve that authentic Australian sourdough experience at home. Let’s get started on creating a loaf that rivals the best bakery finds.

Ingredients for australian sourdough bread

High-protein flour and active starter create that signature Aussie crusty crumb in just 24 hours.

The sourdough starter is non-negotiable here—it must be 100% hydration and actively bubbling. King Arthur or Caputo flours are ideal for their high protein content, but any bread flour with 12-13% protein will work. For the butter, Plugrá or Land O'Lakes are reliable choices, but avoid salted varieties. The water should be lukewarm (around 80°F)—too hot will kill the starter, too cold will slow fermentation. If you're using instant yeast, it's optional but helps with a more consistent rise, especially in cooler kitchens. For scoring, semolina flour creates that beautiful golden crust, while rice flour makes crisp scoring lines.

No bread flour? All-purpose plus 1 tbsp vital wheat gluten works in a pinch. Short on semolina? Fine cornmeal or all-purpose flour will do, though the crust won't be as crisp. The butter can be substituted with cold vegetable shortening for a similar lamination effect, though the flavor won't be the same. If your starter isn't active enough, feed it 1:1:1 (starter:flour:water) 12 hours before baking to boost its vitality. For scoring tools, a razor blade or lame gives the cleanest cuts, but a sharp knife works too—just dip it in water first to prevent tearing.

This dough is best baked within 12 hours of mixing for optimal flavor and texture. Store any unused starter in an airtight jar in the fridge and feed it weekly to maintain activity. The butter should be kept cold until ready to use—wrap it in parchment paper to prevent sticking. Once baked, the loaf keeps well at room temperature for 2 days or wrapped in a bread bag in the fridge for up to 5 days. For longer storage, freeze the cooled loaf wrapped in foil for up to 3 months—thaw at room temperature before serving.

Step-by-step instructions for Australian sourdough bread

Master this method and you'll achieve an open crumb structure with a crispy crust and that signature tangy depth.

In a large mixing bowl, combine the 3.5 cups all-purpose flour, 0.5 cup bread flour, 1.25 cups lukewarm water, and 0.5 cup active sourdough starter. Mix just until the dry ingredients are fully incorporated and no dry spots remain—this stage is called an autolyse. The dough should look shaggy but cohesive. Cover the bowl with a damp kitchen towel and let it rest for 30 minutes at room temperature. This initial hydration period allows the gluten to begin developing and makes the subsequent kneading easier.

During this time, the dough will transform from a rough mass into something smoother and more elastic. You'll notice it becomes slightly tacky but still manageable. This autolyse step is critical for creating the open, airy crumb structure characteristic of Australian-style sourdough. Don't skip it—it's what separates good bread from exceptional bread.

After the autolyse, add the 0.25 cup cold cubed unsalted butter, 0.5 tsp granulated sugar, 1.5 tsp kosher salt, and 0.25 tsp instant yeast to the dough. Using your hands or a dough scraper, gently fold these ingredients into the dough until fully incorporated. The butter should be evenly distributed as small, pea-sized pieces throughout the dough—this will create those beautiful laminations and contribute to the bread's tenderness.

At this stage, the dough will feel slightly sticky but still workable. If it's too wet, you can add 1 tablespoon of all-purpose flour at a time until it reaches a soft but manageable consistency. The sugar and salt will dissolve into the dough, while the yeast begins its activation. This is where the dough starts to develop its final structure, so handle it gently to avoid overworking the gluten.

Transfer the dough to a lightly oiled bowl, cover it with a damp towel, and let it ferment at room temperature for 4-6 hours. During this time, perform 3 sets of folds at 30-minute intervals. 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. These folds strengthen the gluten structure and create the open crumb we're aiming for.

The dough will rise noticeably during this period, becoming about 50-75% larger than its original size. You'll see bubbles forming on the surface and the dough will feel slightly puffy to the touch. This bulk fermentation develops the flavor and creates the gas bubbles that give sourdough its characteristic texture. If your kitchen is cool, you might need to extend this process to 8 hours—just monitor the dough's activity rather than sticking to a rigid timeline.

Once the dough has risen sufficiently and shows good activity (small bubbles and has increased significantly in volume), turn it out onto a lightly floured surface dusted with 0.25 cup cornmeal. Shape the dough into a tight boule by gathering the edges toward the center and tucking them under. Rotate the boule as you work to create surface tension, which helps maintain its shape during baking. Place the shaped boule seam-side down on a piece of parchment paper dusted with 0.25 cup semolina flour. Cover loosely with plastic wrap and refrigerate for 12-16 hours.

This cold proofing period allows the dough to develop even more flavor and creates a more predictable rise in the oven. The cold temperature slows down yeast activity, which helps create a more controlled oven spring. The semolina flour creates a barrier that prevents the dough from sticking to the parchment. When you remove it from the fridge, the dough should have risen noticeably and feel slightly springy to the touch.

Preheat your oven to 450°F with a Dutch oven inside for at least 45 minutes. Remove the dough from the fridge and carefully transfer it (with parchment) to the hot Dutch oven. Using a razor blade or sharp knife, score the dough in a decorative pattern—this allows the bread to expand properly and creates that beautiful crust. Bake covered for 20 minutes, then remove the lid and bake uncovered for an additional 20-25 minutes until the crust is a deep golden brown.

The bread is done when it reaches an internal temperature of 205-210°F and has a hollow sound when tapped on the bottom. The crust should be crisp and crackly, while the interior should have an open, airy crumb structure with some chewiness. Let the bread cool on a wire rack for at least 1 hour before slicing—this allows the steam to escape and the crumb to set properly. The tangy flavor will develop fully as it cools, giving you that authentic Australian sourdough experience.

Essential equipment for perfect results

Dutch Oven Essentials

The Dutch oven is non-negotiable for authentic Australian sourdough—it traps steam to create that signature open crumb structure and crisp crust. I recommend a 5-6 quart enameled cast iron like Le Creuset or Lodge for even heat distribution.

Preheat it with the bread for 45 minutes at 450°F to ensure proper steam buildup. A Dutch oven with a tight-fitting lid creates the perfect baking environment for that bakery-style crust. 🔥

Digital Thermometer

An instant-read thermometer is your best friend for monitoring dough temperature and doneness. I use a Thermoworks Thermapen to check dough temperature before shaping (74-78°F) and to verify bread is fully baked (205-210°F internal temp).

This prevents overproofing and ensures perfect texture every time. A cheap pop-up thermometer won't cut it—precision matters here.

Scaling Tools

For accurate measurements, use a digital kitchen scale (like OXO Good Grips) to weigh your flour and water. Australian sourdough relies on precise hydration ratios—75-80% total hydration in this recipe. A scale eliminates guesswork and ensures consistent results.

I also keep a baker's percent calculator handy to adjust recipes if needed. A standard measuring cup won't give you the same level of control.

Scoring Tools

Scoring isn't just decorative—it controls how the bread expands. A lamé (razor blade on a handle) gives the cleanest cuts, but a sharp chef's knife works too. Dip your tool in water first to prevent tearing the dough.

For extra crisp scoring lines, brush the dough with water before scoring—this creates a shatteringly crisp crust along the cuts. I always score in a decorative pattern (like a cross or basketweave) for that bakery-style finish. ✨

Dough Scraper

A stainless steel dough scraper (like Kitchy) is essential for handling sticky dough without tearing.

Use it to: - Transfer dough to floured surfaces - Create surface tension when shaping - Clean up dough residue during folding I keep mine near my workstation at all times—it's the most used tool in my sourdough process.

A plastic or wooden scraper won't hold up to the dough's stickiness.

Proofing Box

While not mandatory, a proofing box (or DIY version with a lamp and humidifier) creates ideal conditions for cold proofing. Maintain 80-85°F and 75-80% humidity for predictable dough rise. I use a proofing box during winter when my kitchen is too cool.

Without one, use a turned-off oven with a bowl of hot water on the bottom rack as a makeshift solution. Proper proofing is what gives Australian sourdough its signature tangy depth and open crumb.

Frequently asked questions