Mastering a 100% hydration sourdough bread transforms your kitchen into a bakery—no fancy equipment needed. The secret lies in balancing high hydration with precise fermentation, creating a crust so crisp it crackles and a crumb so open it feels like air itself.
This recipe builds on traditional techniques while incorporating modern shortcuts like cold proofing for predictable results every time.
What sets this bread apart is its 100% hydration ratio, meaning equal parts flour and water by weight, which develops unmatched flavor and texture. The autolyse stage kickstarts gluten formation, while bulk fermentation at room temperature builds structure.
Cold proofing overnight ensures a controlled rise without overproofing, guaranteeing that signature tangy flavor and airy crumb.
By the time it emerges from the oven, you’ll have a loaf with a deeply caramelized crust and an interior so light it practically dissolves on the tongue. The tangy aroma alone will have everyone asking for seconds.
This bread is perfect for sandwiches, toast, or simply enjoying fresh out of the oven with a pat of cultured butter.
The beauty of this method is its flexibility—adjust fermentation times based on your kitchen’s temperature, and experiment with whole grains or seeds for added texture.
Whether you’re a seasoned baker or just starting, this recipe delivers restaurant-quality results with a process that’s surprisingly straightforward once you understand the science behind it.
Ingredients for 100 hydration sourdough bread
Pantry staples meet artisanal technique—just flour, water, time, and patience for restaurant-quality sourdough.
| Ingredient | Amount | Notes |
|---|---|---|
| Unbleached Bread Flour 🌾 | 1000 g | High protein for structure (12-14%) |
| Active Sourdough Starter 🍞 | 350 g | 100% hydration, bubbly and active |
| Filtered Water 💧 | 500 ml | Room temperature, no chlorine |
| Kosher Salt 🧂 | 10 g | Diamond Crystal preferred |
| Olive Oil 🫒 | 1 tbsp | Extra-virgin, for bowl coating |
| Instant Vital Wheat Gluten 🌾 | 20 g | Optional for extra strength |
| Cornmeal 🌽 | 1 cup | For dusting baking surface |
| Ice Water ❄️ | 1 cup | For cold proofing |
| Semolina Flour 🌾 | 1 tbsp | For final dusting |
The flour is your foundation—King Arthur or Caputo are gold standards, but any high-protein bread flour (12-14%) works. Bulk bins at Whole Foods often have great options, or grab a 5-lb bag from Amazon for consistency. Your sourdough starter should be lively with bubbles and a tangy aroma—feed it daily with equal parts flour and water (1:1:1 ratio) for 24 hours before using. The water must be room temp (70-75°F)—cold slows fermentation, hot kills yeast. Pro tip: Use a thermometer to check if you’re unsure.
No sourdough starter? Store-bought levain from a trusted bakery works in a pinch, but it’ll lack the depth of a home-maintained culture. Short on vital wheat gluten? Skip it—the bread will still rise, just slightly less open. The olive oil isn’t just for flavor; it creates a barrier that prevents the dough from sticking to your bowl during autolyse. For the cornmeal, any fine grain works—just don’t use flour here (it’ll make scoring impossible later). And that ice water for cold proofing? It’s non-negotiable—it shocks the yeast into dormancy for perfect overnight fermentation.
Your flour should be stored airtight in the freezer for long-term freshness, but keep a small bag at room temp for daily use. The starter lives in a clean jar in the fridge—feed it weekly if you bake less often. Dough scraps can be saved in a sealed bag in the freezer for up to 3 months (thaw overnight in the fridge). Baked loaves? Cool completely, then wrap in a toweling-lined bag** to maintain moisture for up to 5 days. For that perfect crust, bake within 24 hours of shaping—fresh dough always performs best.
Why You’ll Love This Recipe
- No-Knead, No-Fuss: I’ll admit, I resisted 100% hydration bread at first—too much water, too much risk. But the dough comes together in two minutes with just flour, starter, and water. No sticky mess, no kneading, just a smooth, stretchy blob that’s ready for the fridge or bulk ferment.
- Tangy, Crispy Magic: That first bite? The crust shatters like glass, while the interior stays pillowy and alive with sourdough tang. The olive oil finish adds a subtle richness—no butter needed—and the salt cuts through the sourness just enough to make it irresistible.
- Meal Prep MVP: I bake two loaves on Sundays, let them cool, and they last all week. Toast for breakfast, sandwiches for lunch, or even charred slices with olive oil and salt for dinner. (Yes, I’ve done it.) The high hydration keeps it fresh longer than any store-bought loaf.
- Budget-Friendly Stretch: Five ingredients, zero specialty items. That unbleached flour and salt? Pantry staples. The starter? Free if you already have one. I’ve made this on $3 worth of groceries and fed my whole family—plus leftovers for lunch the next day. No guilt, just good bread.
Step-by-step instructions for 100% hydration sourdough bread
Here’s how to transform your active starter into a loaf with a crisp crust and open, airy crumb.
Mix the Dough with Precision
In a large mixing bowl, combine the 1000 g unbleached bread flour and 20 g instant vital wheat gluten (if using). Create a well in the center and add the 350 g active sourdough starter and 500 ml filtered water at room temperature. Let the starter absorb the water for 2 minutes—this prevents gluten development too early.
Using a dough whisk or your hands, gradually incorporate the flour into the wet ingredients until a shaggy mass forms. Here’s the thing—don’t worry if it looks messy at this stage. The dough will come together as you work. Add the 10 g kosher salt and 1 tbsp extra-virgin olive oil, then mix until just combined. The dough should be sticky but manageable, resembling wet sand more than a smooth ball.
Perform the Cold Proof for Structure
Lightly coat a large bowl with olive oil, then transfer the dough to it. Cover with plastic wrap and refrigerate for 12-16 hours. This cold proofing period allows the gluten to relax and develop slowly, which is crucial for that open crumb structure we’re after. I know it’s tempting to skip this step, but trust me—rushing this leads to dense, gummy bread.
During this time, the dough will rise slightly and develop a smooth, elastic texture. You’ll notice it becomes easier to handle when you take it out of the fridge. The cold also helps control fermentation, giving you more predictable results. If your kitchen is warm, err on the longer side of the proofing window.
Shape and Cold Proof Again
After the initial cold proof, turn the dough onto a surface lightly dusted with 1 cup cornmeal. Gently shape it into a round boule by pulling the edges toward the center and tucking them under. Here’s where it gets tricky—don’t overhandle the dough. You want to create surface tension without developing too much gluten. The dough should feel smooth and slightly springy when pressed.
Place the shaped boule seam-side up in a banneton or bowl lined with a floured kitchen towel. Cover loosely with plastic wrap and refrigerate for another 8-12 hours. This second cold proof allows for final fermentation and gives you that perfect tangy flavor. The dough should have risen noticeably and feel slightly puffy when you check it.
Bake with Steam for Crisp Crust
Preheat your oven to 450°F (232°C) with a Dutch oven inside for 45 minutes. This ensures maximum heat retention. Turn the dough onto a piece of parchment paper, then carefully transfer it to the hot Dutch oven. Dust the top generously with 1 tbsp semolina flour—this creates that beautiful crust we’re after.
Bake covered for 20 minutes, then remove the lid and bake for another 20-25 minutes until the bread reaches an internal temperature of 205-210°F (96-99°C). You’ll know it’s done when the crust is deep golden brown and sounds hollow when tapped on the bottom. The steam during the initial baking creates that crisp exterior while the open crumb develops underneath.
Cool and Enjoy
Remove the bread from the Dutch oven and transfer it to a wire rack. Here’s the crucial part—let it cool completely for at least 2 hours before slicing. I know it’s hard to wait, but cutting into the bread too soon leads to a gummy interior. The crust will firm up as it cools, and that’s when you’ll truly appreciate the texture contrast between the crisp exterior and airy crumb.
Once cooled, slice with a serrated knife and serve. The interior should be open and alveolated with distinct holes, while the crust should be crisp with a slight chew. Each slice should reveal that beautiful tangy flavor from the long fermentation. Store any leftovers wrapped in a bread bag at room temperature for up to 3 days, or freeze for longer storage.
Pro Tips For Making 100 Hydration Sourdough Bread
- Use Cold Water: I learned this the hard way—warm water kills the starter’s energy before mixing. Stick to 68–72°F (20–22°C) filtered water, even if your kitchen’s warm. The dough will wake up slower but develop better structure and flavor over the long autolyse.
- Autolyse for 60 Minutes: Skip the urge to mix in salt or oil right away. Let the flour and water sit uncovered for a full hour—this relaxes the gluten and makes shaping easier. (Yes, even if you’re impatient like me.)
- Bulk Ferment at 75°F: Your dough needs consistency. Use a proofing box or oven with a bowl of hot water to keep bulk fermentation steady at 75°F (24°C). Too cold? It’ll drag for days. Too hot? The yeast will overproof before the starter’s ready.
- Score Deep and Fast: A shallow slash won’t cut it for 100% hydration dough. Use a razor blade at a 45° angle, press firmly, and do it right before baking—no waiting. The dough’s surface is delicate; hesitation = gummy crust.
Perfect pairings for this dish
Butter Pairings
Nothing elevates fresh sourdough like a pat of cultured butter with 10-15% salt content. I reach for Plugrá Cultured Butter—its rich, tangy flavor mirrors the bread’s fermentation notes beautifully.
For a twist, try European-style butter with sea salt like Kerrygold, which adds a mineral depth that pairs perfectly with the bread’s crisp crust. 🧈
Jam and Preserves
Spread fig jam or blackberry preserves on toasted slices for a sweet-tart contrast that cuts through the bread’s tang. I love Bon Appétit Fig Jam—its intense fruitiness balances the sourdough’s acidity.
For a breakfast boost, try orange marmalade with a hint of vanilla bean for a bright, aromatic pairing. Store-bought jams work, but homemade versions with less sugar let the bread’s flavor shine.
Cheese Combinations
Sharp cheeses like aged Gouda or Parmigiano-Reggiano (grated fresh) add nutty richness that complements the bread’s open crumb. For something creamier, try brie or Camembert—their buttery texture melts beautifully into the toasted bread.
I also love smoked cheddar for a bold, smoky contrast that stands up to the tangy fermentation.
Toppings for Open-Faced
Create a gourmet open-faced sandwich with prosciutto di Parma and arugula, finished with a drizzle of aged balsamic glaze. The salty prosciutto and peppery greens create a perfect balance with the bread’s tang.
For a vegetarian option, layer roasted red peppers, goat cheese, and thinly sliced pear—the sweetness of the fruit enhances the sourdough’s complexity. 🍓
Drink Pairings
A crisp white wine like Sauvignon Blanc (from New Zealand) cleanses the palate between bites, while a light-bodied red such as Pinot Noir complements the bread’s richness.
For non-alcoholic options, try sparkling water with lemon or cold-brewed matcha—both highlight the bread’s crisp crust and open crumb without overpowering its natural tang. ☕
Nutrition facts
Frequently asked questions
Why does this recipe use 100% hydration?
The 100% hydration ratio (equal parts flour and water) creates a lighter, more open crumb with enhanced flavor development. This high hydration encourages better gluten structure during fermentation, resulting in that signature airy texture. The extra water also helps with oven spring during baking, giving you that tall, domed loaf.
Can I adjust the recipe for a smaller batch?
Yes! Scale down all ingredients proportionally while maintaining the 100% hydration ratio. For a 500g flour batch, use 250g starter, 250g water, and 5g salt. Keep all other ratios identical to preserve texture. The key is maintaining the same hydration percentage for consistent results.
What if my dough doesn’t rise during cold proofing?
Check your starter first—it should be bubbly and active (float test: drop a spoonful in water; if it floats, it’s ready). If the dough isn’t rising, your kitchen may be too cold (below 68°F/20°C). Try extending the proofing time by 4-6 hours or move it to a slightly warmer spot (like near the oven with the light on). Never skip cold proofing—it’s essential for flavor and texture.
How do I know when the bread is fully baked?
The bread is done when it reaches an internal temperature of 205-210°F (96-99°C) and has a deep golden brown crust. Tap the bottom—it should sound hollow. The edges should pull away slightly from the Dutch oven. If unsure, bake 5 more minutes—underbaking is worse than overbaking for this recipe.
Can I use whole grain flour in this recipe?
Yes, but replace no more than 20% of the bread flour with whole wheat or rye to avoid density. Whole grains absorb more water, so you may need to add 10-20g extra water per 100g whole grain flour. Expect a slightly denser crumb but with more flavor complexity. For best results, use a 50/50 blend of bread flour and whole grain.
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