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America's Test Kitchen sourdough bread recipe isn't just another loaf—it's the science-backed method that finally cracked the code for crusty, airy loaves without the guesswork. After years of testing, they simplified the process while keeping the soul of traditional sourdough alive.
The secret? A predictable starter schedule, precise hydration, and understanding how time and temperature work together.
What makes this recipe different is the balance between tradition and modern tools. You'll use a Dutch oven for that signature oven spring, but the real magic happens in the fermentation—where temperature control transforms dense dough into light, open crumb.
No more rock-hard crusts or gummy centers. This method actually works the first time, even for beginners.
The result is a loaf with a deep golden crust that shatters when you tap it, and a crumb so open it practically melts in your mouth. The flavor develops over days, starting with tangy starter and building to complex, nutty notes.
Best of all? You can bake it in your home oven without fancy equipment.
Whether you're feeding your family or treating yourself, this recipe delivers restaurant-quality sourdough that tastes like it came from a Parisian bakery. Let's get started with the science that makes it foolproof.
Ingredients for america's test kitchen sourdough bread
Foolproof sourdough science meets home kitchen magic—just 10 ingredients for a loaf that rivals Parisian bakeries.
| Ingredient | Amount | Notes |
|---|---|---|
| Active Sourdough Starter 🍞 | ½ cup | 100% hydration, bubbly and active |
| All-Purpose Flour 🌾 | 4 cups | Bread flour preferred for better structure |
| Unsalted Butter 🧈 | ¼ cup | Cold, cubed for easier mixing |
| Granulated Sugar 🍚 | ¼ cup | White or brown, same results |
| Diamond Crystal Kosher Salt 🧂 | 1 ½ tsp | Fine grain preferred for even dissolving |
| Whole Milk 🥛 | 1 cup | Room temperature for best hydration |
| Water 💧 | 1 cup | Room temperature, not tap if chlorinated |
| Active Dry Yeast 🍞 | ¼ tsp | Fresh yeast at half the amount |
| Cornmeal 🌽 | ¼ cup | For dusting Dutch oven |
| Ice Water 💧 | ½ cup | For shaping and final proof |
The sourdough starter is your secret weapon—it needs to be bubbly and active with a tangy aroma. King Arthur or Bob's Red Mill flours work best for structure, but all-purpose is fine in a pinch. For the butter, Plugrá or Land O'Lakes unsalted are reliable choices—just make sure it's cold when you measure. The yeast is optional if you're using a robust starter, but it helps with the initial rise. Room temperature milk and water are crucial; cold liquids slow fermentation, while hot liquids kill the yeast. If your tap water is chlorinated, let it sit out for 24 hours or use filtered water.
No bread flour? All-purpose plus 1 tsp vital wheat gluten mimics the protein structure. Short on butter? Olive oil at half the amount works, though the flavor will differ. Swapping brown sugar for white won't change the outcome, but the loaf will have a slightly different texture. If your starter isn't ready, instant yeast at 0.5 tsp can jumpstart the process, though the flavor won't be as complex. For the Dutch oven, Le Creuset or Lodge brands are ideal, but any heavy pot with a lid will do. Preheat it alongside your oven—this is non-negotiable for that signature oven spring.
Starter can be stored in the fridge for up to 2 weeks, but feed it daily to keep it active. The dough benefits from a slow, cold proof in the fridge overnight—this develops deeper flavor. Once baked, the loaf stays fresh for 3-4 days at room temperature, wrapped in a towel. For longer storage, freeze slices wrapped in parchment—up to 3 months. The crust gets crunchier as it cools, so slice it when it's still warm if you want that perfect texture.
Why You'll Love This Recipe
- No-Knead Magic: I swear by this—just mix, let it rise, and bake. The ATK method takes the guesswork out of sourdough, and that butter-rich dough? It practically shapes itself.
- Buttery Tang Perfection: The sugar and salt balance the sourdough’s tang so well, it’s like a hug for your taste buds. That crisp crust with a soft, airy interior? I could eat it for breakfast, lunch, and dinner.
- Weeknight Workhorse: This bread is my go-to for sandwiches, toast, or even garlic butter dipping. It keeps for days, so I bake one batch and forget it—until someone inevitably asks for more.
- Budget-Friendly Staple: All-purpose flour and a little butter stretch the sourdough starter’s magic. One loaf feeds my family for days, and the leftovers? Perfect for croutons or French toast. Smart, simple, satisfying.
Step-by-step instructions for america's test kitchen sourdough bread
Here's the method that delivers a perfectly crusty loaf with an open crumb and tangy flavor every time.
Mix the Dough and Autolyse for Optimal Gluten Development
In a large mixing bowl, combine the 4 cups all-purpose flour with the 0.5 cup active sourdough starter. Using a dough whisk or your hands, mix just until the flour is fully incorporated and no dry spots remain. This creates a rough dough that will develop structure during the autolyse phase.
Add the 1 cup whole milk and 1 cup water to the bowl, then mix again until the dough comes together. The mixture should be shaggy but cohesive. Cover the bowl with plastic wrap and let the dough rest for 30 minutes. This autolyse period allows the flour to fully hydrate and gluten to begin developing before we add yeast and other ingredients.
After 30 minutes, check the dough—it should be smoother and more pliable. If it sticks to your fingers, that's normal. Now add the 0.25 cup unsalted butter, 0.25 cup granulated sugar, 1.5 tsp diamond crystal kosher salt, and 0.25 tsp active dry yeast. Mix thoroughly until all ingredients are evenly distributed and the dough is smooth.
Bulk Ferment at Controlled Temperature for Maximum Flavor
Turn the dough onto a lightly floured surface and perform a series of stretch-and-folds every 30 minutes for 2 hours. To do this, grab one side of the dough, stretch it upward, and fold it over itself. Rotate the bowl and repeat this process on all sides. This builds gluten structure and strengthens the dough for shaping.
After the final stretch-and-fold, cover the bowl loosely with plastic wrap and let the dough bulk ferment at 75°F for 1-2 hours, or until it has roughly doubled in size and shows 30-40% overproofing. You'll know it's ready when the dough springs back slowly when poked with a finger and leaves a slight indentation.
I like to use a digital thermometer to monitor the dough temperature during fermentation. If your kitchen is cooler, the dough may take longer to ferment. The goal is to develop flavor while maintaining proper structure—this controlled fermentation is what gives sourdough its signature tang and open crumb.
Shape and Final Proof for Perfect Structure
Lightly dust a work surface with 0.25 cup cornmeal and turn out the dough. Gently shape it into a round boule by pulling the edges toward the center and tucking them under. Rotate the dough as you work to ensure even tension. The surface should be smooth with no cracks.
Place the shaped dough seam-side up in a floured proofing basket or bowl. Cover loosely and let it proof at 75°F for 1-2 hours, or until it has risen 50-60%. The dough should feel firm to the touch and spring back slowly when poked. This final proof is crucial for developing the open crumb structure that makes sourdough so satisfying.
Bake with Steam for Maximum Crust Development
Preheat your Dutch oven with lid in a 475°F oven for 45 minutes. This ensures it's piping hot when you add the dough. Carefully transfer the dough to parchment paper, then slide it into the hot Dutch oven. Cover immediately with the lid and bake for 20 minutes. This steam phase is what creates that coveted crispy crust.
After 20 minutes, remove the lid and continue baking for another 20-25 minutes, until the internal temperature reaches 205-210°F. The bread should have a deep golden brown color with a crisp crust. You'll hear a hollow sound when you tap the bottom—this is your cue that it's fully baked.
Let the bread cool on a wire rack for at least 1 hour before slicing. This resting period allows the gluten to relax and the crumb to set properly. The longer you wait, the easier it will be to slice without crumbling. The final result should be a loaf with a thick, shatteringly crisp crust and an open, airy crumb with pockets of tangy flavor.
Pro Tips For Making America'S Test Kitchen Sourdough Bread
- Weigh Your Starter: The ATK recipe calls for 100g of starter—don’t eyeball it. A kitchen scale here saves you from overproofing or underproofing later. I learned this the hard way when my first batch turned out dense because I guessed the starter was 120g instead of 100g.
- Salt the Water First: Dissolve the 2 teaspoons of Diamond Crystal kosher salt in the water before adding the butter and sugar. This ensures even distribution—no clumpy salt pockets in your dough. My grandmother swore by this, and she was right: the flavor is noticeably more balanced.
- Don’t Rush the Autolyse: Let the dough rest for the full 30 minutes after mixing flour, water, and starter. This step hydrates the gluten properly, making shaping easier later. I was skeptical until I tried it—skipping it leads to a tougher crumb, no matter how much you fold.
- Preheat Dutch Oven with Lid: Place the Dutch oven (with lid) in the oven while it preheats to 475°F. This guarantees the lid is scalding hot when you transfer the dough, which is crucial for that signature oven spring. After burning three batches, I finally figured out this non-negotiable step.
Wine and beer pairings for america's test kitchen sourdough bread
Crisp White Wine
Sourdough's tangy complexity pairs beautifully with a dry Riesling from Germany or Alsace. The wine's bright acidity cuts through the bread's richness while highlighting its nutty, caramelized notes.
I love Dr. Loosen Blue Slate—its crisp finish mirrors the bread's crisp crust. Serve slightly chilled (45-50°F) to enhance the contrast. 🍷
Malty Amber Ale
For beer lovers, an amber ale with caramel and biscuit notes complements sourdough's depth. Look for Allagash White or New Belgium Fat Tire—the malt sweetness balances the bread's tang while the hop bitterness adds complexity. The carbonation also cleanses your palate between bites. 🍺
Light Red Option
If you prefer red, a Pinot Noir with bright acidity works surprisingly well. I recommend Meiomi—its cherry and vanilla flavors harmonize with the bread's crusty exterior and open crumb. Keep it slightly cooler than room temperature (55-60°F) to preserve freshness. 🍇
Cider Pairing
Don't overlook dry hard cider—especially Angry Orchard—for a unique pairing. The cider's apple acidity and subtle spice notes echo the bread's fermentation tang while adding a refreshing twist. This combination feels especially seasonal during autumn. 🍎
Coffee or Tea
For a non-alcoholic option, dark roast coffee with 2% milk enhances sourdough's nutty flavors. The bitterness in the coffee mirrors the bread's crust, while the milk softens the tang. Alternatively, a chamomile tea—with its floral notes—pairs surprisingly well with the bread's earthy undertones. ☕
Nutrition facts
Frequently asked questions
How do I know if my sourdough starter is active enough for this recipe?
The starter should have visible bubbles and a tangy aroma when you poke it. It should also float in water—drop a spoonful in a glass of water, and if it rises, it's ready! For best results, use a starter that's 24-48 hours old after feeding. If it's sluggish, feed it with equal parts flour and water and wait another 4-6 hours.
Can I substitute bread flour for all-purpose flour in this recipe?
Yes, but add 1 teaspoon vital wheat gluten per 4 cups all-purpose flour to mimic bread flour's protein structure. The recipe works with all-purpose, but bread flour gives a slightly better oven spring and crumb. If you're short on time, all-purpose will still yield great results—just expect a marginally denser texture.
Why did my sourdough turn out dense instead of crusty and airy?
Dense bread usually means underproofed dough or insufficient gluten development. Check your bulk fermentation time—it should rise 30-40% before shaping. Also, ensure you did stretch-and-folds during bulk fermentation (every 30 minutes for 2 hours) to strengthen the gluten. If your kitchen is cold, use a proofing box or warm oven (75°F) to speed up fermentation.
Do I need a Dutch oven for this recipe? What can I use instead?
A Dutch oven is ideal for trapping steam, but you can use a heavy oven-safe pot with a lid (like a cast-iron skillet or stainless steel pot). If you don’t have one, create steam by placing a baking sheet with boiling water on the lower oven rack while baking. The crust won’t be as crispy, but the bread will still be delicious. For best results, preheat your substitute for 45 minutes just like the Dutch oven.
How long can I keep the dough in the fridge before baking?
You can refrigerate the dough for up to 24 hours after bulk fermentation for deeper flavor development. Place it in an airtight container or sealed bag, and let it come to room temperature before shaping and baking. Cold dough needs extra time to proof—expect 2-3 hours at 75°F after shaping. This slow fermentation enhances the sourdough's complexity.