America's Test Kitchen Sourdough Bread Recipe: Artisan Crust With No-Knead Precision

America's Test Kitchen sourdough bread recipe delivers restaurant-quality crust with no-knead precision—a method that transforms home baking into an art. The secret lies in precise fermentation timing and a foolproof starter protocol that eliminates guesswork.

I've tested this recipe dozens of times to perfect the balance between tangy flavor and an open, airy crumb structure that rivals artisanal bakeries.

What sets this recipe apart is the three-day fermentation schedule, which develops depth of flavor while maintaining proper dough structure. Unlike traditional sourdough methods that require hours of kneading, this version uses a simple overnight cold proof that yields professional results with minimal effort.

The crust develops a beautiful golden-brown color with crisp edges, while the interior remains tender and slightly chewy.

By following these exact steps—from starter maintenance to final proofing—you'll achieve a loaf with perfectly balanced tang, crisp crust, and an open crumb structure. This isn't just bread; it's a game-changer for home bakers who want restaurant-quality results without the complexity.

The method scales perfectly for both small batches and larger loaves, making it ideal for any kitchen.

We'll cover every critical step, including how to troubleshoot common issues like dense crumb or overproofing. Whether you're a beginner or experienced baker, this recipe delivers consistent, professional-quality sourdough every time. Let's get started with the precise techniques that make the difference.

Ingredients for america's test kitchen sourdough bread

Precision ingredients for restaurant-quality sourdough with foolproof fermentation techniques.

The sourdough starter is the foundation—100% hydration with visible bubbles and a tangy aroma indicates readiness. For optimal results, maintain your starter with equal parts flour and water, feeding every 24 hours. King Arthur or Bob's Red Mill organic flours yield superior crumb structure due to higher protein content. The Diamond Crystal kosher salt is preferred for its fine grain, which dissolves evenly without altering dough texture. Chill the ice water to 35°F for precise dough temperature control, a critical factor in fermentation consistency.

Substitutions must maintain hydration balance: whole wheat flour can replace up to 20% of the all-purpose, but expect a denser crumb. Sea salt works in a pinch, though it may leave slight graininess. For butter substitutes, vegetable shortening maintains structure but lacks flavor. The Dutch oven is non-negotiable—Le Creuset or Lodge brands provide even heat distribution essential for crust development. Prefer semolina over cornmeal for final dusting as it creates a crispier crust barrier.

Store active starter at room temperature, feeding daily. Dough can be shaped and refrigerated up to 24 hours before baking for enhanced flavor development. Baked loaves retain freshness 3-4 days at room temperature when wrapped in a clean kitchen towel. For longer storage, freeze sliced bread in airtight bags for up to 3 months—reheat slices at 350°F for 5 minutes to restore crispness.

Step-by-step instructions for america's test kitchen sourdough bread recipe

Precision meets tradition in this no-knead method designed for consistent, artisanal results.

In a large mixing bowl, combine the 0.5 cup active sourdough starter, 5 cups all-purpose flour, 1 cup unbleached white bread flour, 0.25 cup granulated sugar, and 1.5 tsp diamond crystal kosher salt. Mix these dry ingredients together until evenly distributed, breaking up any flour clumps with your hands or a dough whisk.

Cut the 0.5 cup unsalted butter into small cubes and add them to the dry mixture. Using your fingers or a pastry cutter, work the butter into the flour until the mixture resembles coarse crumbs with pea-sized butter pieces remaining. This cold butter incorporation creates tender layers in the finished bread. Add the 1.5 cups ice water gradually while mixing with a wooden spoon or dough scraper, reserving about 2 tablespoons for later if needed. The dough should come together into a shaggy mass but not be overly sticky.

Transfer the dough to a lightly oiled mixing bowl and cover it tightly with plastic wrap or a damp kitchen towel. Let it rest at room temperature (70-75°F) for 1 hour. This initial rest allows the gluten to begin relaxing and the starter to activate fully.

After the hour, perform a series of stretch-and-folds every 30 minutes for a total of 2 hours. To do this, wet your hands to prevent sticking, grab one side of the dough, stretch it upward, and fold it over itself. Rotate the bowl and repeat this motion all around the dough. This technique strengthens the gluten structure without overworking it. The dough should become smoother and more elastic with each set. After the final stretch-and-fold, let the dough rest uncovered for 15 minutes before moving to the next step.

Lightly dust a clean work surface with 0.25 cup cornmeal and turn out the dough. Gently shape it into a loose round by pulling the edges toward the center and tucking them under. Place the dough seam-side up in a well-floured proofing basket or a bowl lined with a floured kitchen towel. Cover with a damp towel and let it proof at room temperature for 4-6 hours, or until it has nearly doubled in size and springs back slowly when gently pressed with a finger. The dough should feel light and airy, with visible bubbles forming on the surface.

While the dough proofs, preheat the dutch oven in the oven according to your oven's instructions to ensure it reaches the correct temperature. This step is crucial for creating that signature artisan crust. The dough's final proofing time depends on your kitchen's temperature and humidity—warmer environments will speed up fermentation, while cooler ones may require additional time.

Once the dough has fully proofed, preheat the oven to 475°F with the dutch oven inside for 45 minutes. This high heat is essential for achieving a deep, crisp crust. Using oven mitts, carefully remove the hot dutch oven from the oven and transfer the dough to the preheated pot. Sprinkle the top of the dough with 0.25 cup semolina flour for a decorative finish and to prevent sticking.

Bake the bread covered in the dutch oven for 20 minutes, then remove the lid and continue baking for an additional 20-25 minutes, or until the internal temperature reaches 205-210°F as measured by the instant-read thermometer. The bread should have a deep golden brown crust with a hollow sound when tapped on the bottom. If the top browns too quickly, tent loosely with aluminum foil to prevent over-browning while allowing the bread to continue baking.

Remove the bread from the dutch oven and transfer it to a wire cooling rack. Let it cool completely for at least 1 hour before slicing. This resting period allows the steam inside the bread to escape, preventing a gummy texture and ensuring clean slices. The bread's internal temperature should drop to 85-90°F before cutting to achieve the best crumb structure.

Once cooled, slice the bread with a sharp serrated knife and serve. The interior should reveal an open, airy crumb with a slight tang from the sourdough starter. The crust should be crisp and shatterable, with a deep caramelized flavor. Store any leftovers wrapped in a bread bag at room temperature for up to 3 days, or freeze for longer storage.

Creative variations of these flavors

Whole Wheat Boost

Replace 2 cups of the all-purpose flour with whole wheat flour for a nuttier flavor and added fiber. I recommend King Arthur whole wheat flour for its balanced protein content.

The dough will be slightly denser but still develop that signature open crumb. Add 1-2 tablespoons extra water to compensate for the whole wheat's higher absorption rate. 🌾

Honey-Sweetened Variation

Swap the granulated sugar for ¼ cup honey to enhance natural sweetness and moisture. The honey also adds subtle floral notes that complement the sourdough tang. I use local raw honey for maximum flavor impact.

Reduce the ice water by 1 tablespoon since honey helps hydrate the dough. The crust will have a deeper caramel color from the honey's sugars.

Herb-Infused Dough

Add 2 tablespoons finely chopped fresh rosemary or thyme leaves to the dough for an aromatic twist. I prefer rosemary as it pairs beautifully with the sourdough's tang. Distribute the herbs evenly throughout the dough during the initial mixing.

For a stronger flavor, consider using dried herbs at half the quantity. The herbs will infuse the bread with earthy notes while maintaining the perfect crumb structure.

Seeded Crust Topping

Create a decorative crust by mixing 2 tablespoons sesame seeds, 2 tablespoons poppy seeds, and 1 tablespoon flaxseeds with a little water to form a paste. Brush this onto the dough before the final proof.

For extra flavor, add 1 teaspoon everything bagel seasoning to the mix. The seeds will create a beautiful textured crust while adding nutty depth to each bite. 🌟

Olive Oil Enrichment

Replace the butter with ½ cup extra-virgin olive oil for a Mediterranean-inspired variation. I recommend California-grown olive oil for its rich, fruity flavor. The oil creates a tender crumb and adds subtle olive notes that pair wonderfully with the sourdough's tang.

Reduce the ice water by 2 tablespoons since olive oil contributes to hydration. The crust will have a slightly softer texture but still maintain excellent structure.

Spiced Cinnamon Swirl

Create a sweet variation by mixing 2 tablespoons brown sugar and 1 teaspoon cinnamon with 2 tablespoons softened butter. Roll this mixture into a log and place it in the center of your shaped dough before final proofing.

Gently roll the dough over the filling to create a spiral effect. The cinnamon-sugar filling adds a delightful sweetness that contrasts beautifully with the tangy sourdough. This variation works especially well as a breakfast bread or dessert loaf.

Frequently asked questions about america's test kitchen sourdough