Sourdough Whole Wheat Hearty Loaf
A rustic, deeply flavored sourdough loaf that blends whole wheat and bread flour for complexity and structure. Long cold fermentation overnight develops acidity and enhances the grain's nutty character. The result is a loaf with an open crumb, chewy texture, and bold sourdough tang.
- Prep
- 30 min
- Cook
- 50 min
- Wait
- 17 hr
- Total
- 18 hr 20 min
- Makes
- 1 loaf (approximately 750 g / 1 lb 10 oz)
Steps
Before you start
- Ensure your sourdough starter is fed and bubbly (not sluggish) at least 4–6 hours before mixing
- Use a digital scale for accuracy; baker's percentages are given for reference
- Plan so cold fermentation happens overnight (12–18 hours), ending in morning or early afternoon
- Have a banneton or proofing bowl lined with a floured kitchen towel ready
Mix dough
- Combine 150 g active starter, 350 g bread flour, 150 g whole wheat flour, and 350 ml cool water in a large bowl.
- Stir until no dry flour remains; the dough will be shaggy and rough.
- Cover loosely and let rest at room temperature for 30–60 minutes (autolyse phase).
- This hydrates the flours and begins gluten development.
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Ready when: Dough looks moistened but shaggy
Tip: Cool water slows fermentation, essential for overnight cold proof; warm water risks over-fermentation.
Incorporate salt and strengthen
- Wet your hand with water.
- Add 10 g salt to the dough and fold it in using wet-hand pincer folds: pinch and fold the dough from the edges toward the center, rotating the bowl as you go.
- Perform 8–10 folds over 10 minutes, pausing 1–2 minutes between folds.
- The dough will become smoother and hold together better.
- This develops gluten without kneading.
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Ready when: Dough feels cohesive and slightly elastic; surface looks smoother
Tip: Wet hands prevent sticking and allow smoother folds; don't rush—brief rests between folds let gluten relax and strengthen.
Bulk ferment (room temperature)
- Cover the bowl and let the dough bulk ferment at room temperature (68–72°F / 20–22°C) for 4–6 hours.
- Perform 4 sets of coil folds or stretch-and-folds at 30-minute intervals during the first 2 hours: wet your hand, lift one side of the dough, fold it over the center, rotate bowl 90°, repeat.
- The dough should increase by 50–75% in volume and show slight dome on top.
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Ready when: Dough volume increases visibly; poke test shows indentation that springs back slowly (40–50% recovery)
Tip: Whole wheat flour is thirstier than white flour—dough may feel slightly sticky, which is normal and desirable for open crumb.
Pre-shape the dough
- Turn the dough onto a lightly floured work surface.
- Use a bench scraper to gently pre-shape into a loose round, being careful not to degas it completely.
- Rest for 15–20 minutes uncovered (bench rest).
- This allows the gluten to relax before final shaping.
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Ready when: Dough relaxes and softens slightly; hold its shape but doesn't resist forming
Tip: Handle gently—aggressive handling degasses the dough and produces dense crumb. Let gravity do the work.
Final shape and banneton proof
- Flip the dough over so the seam side is up.
- Gently fold the bottom third up toward center, seal with the heel of your hand, then fold the top down and seal.
- Finally, fold the left and right edges inward and seal to create tension on the surface.
- Flip seam-side down into a floured banneton.
- Cover tightly and refrigerate at 38–40°F (3–4°C) for 12–18 hours.
- Cold fermentation develops flavor and makes scoring easier.
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Ready when: Dough is cold, firm, and holds its shape; poke test at the surface shows slow recovery (ready to bake)
Tip: Overnight cold fermentation is the key to flavor—don't skip it. You can bake straight from the fridge.
Preheat oven and scoreOven 500°F / 260°C
- About 1 hour before baking, preheat your Dutch oven (uncovered) to 500°F (260°C).
- Once the oven reaches temperature, carefully remove the cold dough from the banneton and flip onto parchment paper.
- Using a lame or sharp knife, score the top with a single confident slash about ½ inch deep at a 30-degree angle, or use two shorter slashes crossing in an X.
- Dust off excess flour.
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Ready when: Oven is fully preheated (thermometer steady at 500°F / 260°C)
Tip: A hot Dutch oven creates steam that expands the dough and creates bold oven spring. Do not open during the first 20 minutes.
Bake with coverOven 500°F / 260°C
- Carefully place the parchment with dough into the preheated Dutch oven (wear oven mitts).
- Cover with the lid.
- Bake at 500°F (260°C) for 20 minutes.
- The steam trapped inside will cause the dough to expand dramatically.
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Ready when: You will hear the dough crackling as it sets; the loaf will expand noticeably
Tip: Do not lift the lid during the first 20 minutes—opening releases steam and reduces oven spring.
Remove cover and finish bakingOven 450°F / 230°C
- Remove the Dutch oven lid carefully (steam will be very hot).
- Reduce oven temperature to 450°F (232°C).
- Continue baking for 25–30 minutes until the crust is deep golden brown and the loaf sounds hollow when tapped on the bottom.
- Internal temperature should reach 205–210°F (96–99°C).
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Ready when: Crust is deep mahogany brown; tap the bottom and it rings hollow; internal temp 205–210°F (96–99°C)
Tip: Whole wheat adds color and absorbs more water, so don't be alarmed if the crust looks darker than expected—it's correct.
Cool on wire rack
- Transfer the loaf to a wire rack using a spatula or tongs.
- Cool completely (at least 1 hour, preferably 2–3 hours) before slicing.
- The crumb continues to set as it cools, and slicing too early results in a gummy interior.
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Ready when: Loaf is at room temperature and feels light to the touch
Tip: Resist the urge to cut into it—cooling is as important as baking. A warm loaf crumbles; a cooled one slices cleanly.
Good to know
Tips
- Starter strength is crucial: use starter that has roughly doubled and is bubbly within 4–6 hours of feeding. Sluggish starter yields dense loaves—discard half and feed again, then wait 8 hours before using.
- Whole wheat flour absorbs more water than white flour. If your dough feels sticky after mixing, do not add more flour; it will adjust during bulk fermentation. Trust the process.
- Cold fermentation is where the magic happens: the slow metabolism at refrigerator temperature allows wild yeast and bacteria to produce complex flavors and acidity you cannot achieve in 4–6 hours at room temperature.
- If your kitchen is very warm (above 75°F / 24°C), start with slightly cooler water or reduce bulk fermentation time. If very cold (below 65°F / 18°C), extend bulk fermentation or use warmer water to maintain a steady pace.
Make ahead
The cold fermentation overnight is the make-ahead step. You can also mix the dough the evening before, perform bulk fermentation the next morning, shape in the afternoon, and bake the following morning. Total timeline: 2 days.
Storage & reheating
Room temperature: 2–3 days in an airtight container or breadbox (crust will soften). Refrigerator: up to 1 week wrapped tightly; toast slices or warm gently in a 300°F (150°C) oven for 10 minutes to revive. Freezer: up to 3 months wrapped in plastic then foil; thaw at room temperature 3–4 hours or slice while frozen and toast directly from freezer.
Substitutions
- whole wheat flour → spelt flour or einkorn flour. Spelt and einkorn are lighter and more delicate; reduce to 120 g and increase bread flour to 380 g for better structure.
- bread flour → all-purpose flour. All-purpose flour has lower protein; increase amount to 370 g and reduce water to 330 ml slightly for firm dough. Loaf will be less open but still good.
- cool water (65–70°F / 18–21°C) → use warmer water (75–80°F / 24–27°C). Warmer water accelerates fermentation; reduce cold fermentation time to 8–10 hours. Use room-temperature bulk fermentation instead if you cannot do overnight cold proof.
- active sourdough starter, at room temperature → 100% rye or wheat-based starter. Whole-grain starters are stronger; reduce to 130 g and watch fermentation carefully—it may move faster.
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