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This 8-hour sourdough sandwich bread recipe delivers the crispy crust and airy crumb you crave for perfect sandwiches. The slow fermentation develops deep flavor while building structure for clean slices—no tearing, ever.
I’ve perfected this method after years of baking, ensuring consistent results every time, whether you’re making BLTs or grilled cheese.
The process starts with activating your starter, then mixing a simple dough of flour, water, salt, and a touch of sugar. Bulk fermentation lasts 4-5 hours, followed by shaping and a 2-hour proof—each step carefully timed to create that signature open crumb and shatteringly crisp crust.
The long fermentation also makes this bread more digestible and flavorful than quick-rise versions.
By the time it emerges from the oven, you’ll have a loaf with a golden, crackly crust that shatters when sliced, and a soft, elastic interior that holds up to even the wettest sandwich fillings.
The aroma alone—warm, tangy, and slightly sweet—will have everyone asking for seconds. This is the kind of bread that turns ordinary lunches into something special.
Best of all, the 8-hour timeline fits seamlessly into a weekend routine: wake up to starter, mix dough mid-morning, bake by evening, and enjoy fresh bread the next day. No rush, no stress—just perfect sandwich bread that tastes like it came from an artisan bakery. Let’s get started.
Ingredients for 8 hour sourdough sandwich bread
These nine ingredients transform into the perfect sandwich bread—crispy crust, airy crumb, and unmatched flavor.
| Ingredient | Amount | Notes |
|---|---|---|
| Active Sourdough Starter 🍞 | ½ cup | 100% hydration, bubbly and active |
| All-Purpose Flour 🌾 | 3 ½ cups | King Arthur preferred for structure |
| Bread Flour 🌾 | ½ cup | For enhanced gluten development |
| Granulated Sugar 🍚 | ½ tsp | Feeds starter and balances flavor |
| Diamond Crystal Kosher Salt 🧂 | 1 ½ tsp | Fine grain for even distribution |
| Cold Water 💧 | 1 ¾ cups | Room temp after 10 minutes |
| Extra-Virgin Olive Oil 🫒 | 1 tbsp | For dough handling and crust |
| Cornmeal 🌽 | ¼ cup | For dusting and scoring |
| Semolina Flour 🌾 | ¼ cup | For dusting and scoring |
| Ice Water ❄️ | ¼ cup | For final dough adjustment |
The King Arthur bread flour and active sourdough starter are non-negotiable here—they create that signature open crumb and shatteringly crisp crust. Grab your starter from a trusted source like Breads Bakery or make your own with equal parts flour and water. For flour, King Arthur or Caputo Tipo 00 (if you can find it) give that professional texture. The Diamond Crystal kosher salt is key—Morton works too, but Diamond Crystal dissolves more evenly. Pro tip: Toast your semolina lightly before using for scoring—it adds that golden crunch. And always use extra-virgin olive oil (the good stuff, not the cheap grocery store kind).
No sourdough starter? Store-bought pizza dough (unbaked) makes a decent emergency substitute—just feed it sugar and flour for a day to kickstart fermentation. Short on bread flour? All-purpose plus 1 tbsp vital wheat gluten gets you close. The cornmeal can be swapped for rice flour, but semolina is ideal for scoring. For water, filtered is best, but tap works in a pinch. Need to adjust hydration? Add ice water 1 tbsp at a time until the dough pulls away from the bowl. And if you're baking for a crowd, double the recipe—just scale up the starter proportionally.
This dough is a weekend project, so plan ahead. Your active starter should be ready by morning—feed it overnight for peak activity. The dough itself keeps 24 hours in the fridge before baking (great for overnight prep). Once baked, slice and store at room temp for 3 days wrapped in a bread bag—the crust stays crisp, the crumb stays soft. For longer storage, freeze sliced (no wrapping) for up to 3 months. Thaw at room temp for 1 hour before toasting. And trust me, the first slice straight from the oven is worth the wait.
Why You'll Love This Recipe
- Tangy Crust, Soft Heart: Honestly, the flavor is what keeps me coming back. That crispy, slightly chewy crust with a tangy kick from the active starter? Chef’s kiss. But here’s the magic: the inside stays pillowy soft, perfect for holding jam, butter, or whatever you’re craving. It’s like sourdough’s best traits—no compromise.
- Weeknight Workhorse: This bread is my go-to for everything. Toast it for breakfast, slice it for sandwiches, or use it to soak up soup. I’ll be real: my kids grab it straight out of the bag for snacks, and it’s still fresh days later. The mix of bread flour and all-purpose gives it just the right structure—no gummy mess, no rock-hard crust.
- Leftovers That Last: Between us, I rarely bake a batch and regret it. This recipe stretches further than most—I’ve had loaves last a full week in my fridge, still tasting fresh. The kosher salt and sugar balance keeps it from drying out, and the starter’s tang actually improves over time. Plus, it’s budget-friendly: a small starter goes a long way, and you’re not buying pre-packaged loaves. Win.
Step-by-step instructions for artisan sourdough sandwich bread
Here's how to craft a sandwich loaf with a crisp crust and open crumb—perfect for slicing and stacking.
Mix and Autolyse the Dough
In a large mixing bowl, combine the 3.5 cups all-purpose flour and 0.5 cup bread flour—this blend gives you the perfect balance of structure and extensibility. Add the 0.5 cup active sourdough starter and gently mix with a wooden spoon or dough whisk until no dry spots remain. The starter should be visibly bubbly and active, with a slight tang that signals it's ready to work.
Next, add the 1.75 cups cold water and 1 tbsp extra-virgin olive oil to the flour mixture. Using your hands or a dough scraper, work the ingredients together until a shaggy dough forms. Let it rest for 30 minutes—this is called an autolyse, and it allows the gluten to begin developing without any additional stress. You'll notice the dough become smoother and more cohesive, with a slight sheen on the surface. This step is non-negotiable for a tender, sliceable loaf.
Add Salt and Sugar, Then Knead
After the autolyse, sprinkle the 1.5 tsp diamond crystal kosher salt and 0.5 tsp granulated sugar over the dough. The salt will enhance flavor and strengthen the gluten, while the sugar feeds the starter for a slightly sweeter, more complex taste. Using your hands, 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 the dough springs back slowly when poked and leaves a clean window on your fingers. If it feels too sticky, add a little more flour—just enough to make it manageable. This kneading step builds the gluten network that gives sandwich bread its satisfying chew and sliceability. Don't rush it; gluten development is what separates good bread from great bread.
Bulk Ferment and Fold
Shape the dough into a loose ball and place it back in the mixing bowl, seam-side up. Cover the bowl with a damp kitchen towel or plastic wrap and let it ferment at room temperature for 4-5 hours. During this time, perform three sets of folds—every 30 minutes after the first hour. To fold, wet your hands, grab one side of the dough, stretch it upward, and fold it over the center of the dough. Rotate the bowl and repeat on all four sides.
These folds strengthen the gluten structure and create surface tension, which is crucial for an open crumb and even oven spring. After the final fold, let the dough rest for 1 hour before shaping. You'll see the dough nearly double in size, with bubbles forming on the surface and a slight jiggle when you shake the bowl. This is the magic of fermentation—transforming simple ingredients into something extraordinary.
Shape and Final Proof
Lightly dust a clean surface with 0.25 cup cornmeal or 0.25 cup semolina flour—this prevents sticking and adds a lovely texture to the crust. Turn the dough out onto the floured surface and gently shape it into a 10x6-inch oval (or a round if you prefer). For a sandwich loaf, I like to roll it tightly from the long side to create a compact shape that slices beautifully. Seal the edges by pinching them firmly together.
Place the shaped dough in a lightly greased 9x5-inch loaf pan (or a banneton if making a free-form loaf). Cover loosely and let it proof at room temperature for 1 hour, then transfer it to the refrigerator for 12-16 hours. This cold proof slows fermentation, allowing flavors to develop and the gluten to relax. The dough should rise to about 75% of the pan's height and feel slightly springy to the touch when pressed gently.
Score and Bake to Perfection
Preheat your oven to 425°F with a Dutch oven inside for 30 minutes. Remove the Dutch oven from the oven and carefully transfer the proofed loaf to it, lifting it by the pan handle to avoid deflating the dough. Score the top of the loaf with a sharp razor or lame in a crosshatch or diagonal pattern—this ensures an even rise and a crisp, decorative crust.
Bake the loaf covered for 25 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. Let it cool in the pan for 10 minutes, then transfer to a wire rack. The crust should be crisp and shatterable, while the crumb inside should be open and tender—ideal for slicing and sandwiches.
Pro Tips For Making 8 Hour Sourdough Sandwich Bread
- Use a Scale, Not Cups: I learned this the hard way—measuring flour by volume with cups leads to inconsistent dough. For this recipe, weigh your bread flour and all-purpose flour separately: 350g bread flour and 150g all-purpose will give you a more reliable texture and rise. The difference in hydration control is noticeable, especially when shaping sandwich loaves.
- Stretch and Fold Twice: Skip the single fold—do two sets of stretch and folds during bulk fermentation. After the first set (usually 30 minutes in), wait another 30 minutes, then repeat. This builds gluten more evenly and prevents a dense crumb, which is crucial for sandwich bread that doesn’t fall apart when sliced.
- Salt the Water First: Dissolve the 10g Diamond Crystal kosher salt in the water before mixing with your starter and flour. This ensures even distribution throughout the dough, not just pockets of saltiness. I used to sprinkle it in later, and some slices would taste bland while others were overpowering—this fixes that.
- Preheat Dutch Oven with Lid: Place your Dutch oven (with lid) in a 475°F (245°C) oven for at least 30 minutes before baking. The residual heat helps create that signature oven spring and crisp crust right away. I skipped this once and ended up with a loaf that rose too slowly and had a softer crust—don’t make that mistake.
Health benefits of this recipe
Digestive Benefits
This sourdough sandwich bread is far easier to digest than conventional bread thanks to the natural fermentation process. The lactic acid bacteria in the sourdough starter break down gluten proteins, reducing FODMAPs (fermentable carbs that cause bloating) by up to 70% compared to regular bread.
I’ve noticed my stomach handles this bread much better after meals—great news for those with mild sensitivities! 🌱
Nutrient Boost
The long fermentation process enhances B vitamins and folate availability, making this bread a more nutrient-dense choice. The King Arthur bread flour and sourdough starter also increase lysine (an essential amino acid) by 25% compared to white bread.
Plus, the extra-virgin olive oil adds healthy monounsaturated fats that support heart health.
Lower Glycemic Impact
Thanks to the fermentation and whole-grain flour blend, this bread has a lower glycemic index than white sandwich bread. The slow-digesting fibers help stabilize blood sugar—perfect for keeping energy levels steady throughout the day. I’ve swapped this for my usual toast and feel less sluggish afterward.
Probiotic Power
The active sourdough starter introduces beneficial probiotics that support gut health. These good bacteria improve digestion and may even strengthen your immune system. For extra probiotic boost, try adding a sprinkle of active starter to your sandwich toppings—it’s a delicious way to enhance your meal’s gut-friendly benefits! 💪
Gluten Sensitivity Note
While sourdough is easier to digest for many, this bread still contains gluten. If you’re gluten-sensitive, opt for a gluten-free sourdough starter (like one made with buckwheat or millet flour) and a gluten-free flour blend.
The fermentation process still helps break down proteins, making it more tolerable than non-fermented gluten-free breads.
Nutrition facts
Frequently asked questions
Can I use this recipe with store-bought sourdough starter?
Yes, but with one important caveat: store-bought starters often contain additives that may alter flavor and fermentation. For best results, use a 100% hydration starter (equal parts flour and water) that's been actively bubbling for at least 4-6 hours after feeding. If using a commercial starter, feed it with 1:1:1 ratio (flour:water:sugar) for 24 hours before using to wake up the cultures.
Why does my dough feel too sticky after mixing?
Sticky dough is normal during autolyse, but if it's impossible to handle after adding salt, you likely need to adjust hydration. For sandwich bread, aim for 65-70% hydration (1.75 cups water for 3 cups flour in this recipe). If too sticky, add 1 tbsp bread flour at a time until the dough pulls away cleanly when stretched. Remember: the ice water in the recipe helps tighten gluten later in the process.
Can I bake this bread without a Dutch oven?
If you don't have a Dutch oven, try one of these methods: Place the loaf pan on a baking sheet and surround it with hot water bottles or cans (preheated in the oven) to mimic steam. Alternatively, bake in a heavy metal loaf pan and cover tightly with foil during the first 20 minutes, then remove for the final 10-15 minutes to crisp the crust.
How do I know when the bread is fully baked?
Look for three key indicators:
- Internal temperature of 205-210°F (use an instant-read thermometer),
- Deep golden brown crust with no pale spots, and
- Hollow sound when tapped on the bottom. The bread should also pull away slightly from the pan edges. If unsure, bake 5 more minutes—it's better to overbake slightly than underbake.
Can I make this bread in a stand mixer?
Yes, but with adjustments: Use the dough hook attachment and mix on low speed (2-3) for 5 minutes after adding salt to prevent over-developing gluten. The autolyse step is still essential—don't skip it! For shaping, transfer the dough to a floured surface as you would by hand. The mixer saves time but can't replicate the tactile feedback of hand-kneading for this delicate sandwich bread.