There’s sourdough bread, and then there’s chocolate sourdough bread. This loaf makes the house smell like you’ve opened a bakery and a chocolate shop. It’ll bring everyone into the kitchen, led by their noses.

This chocolate sourdough recipe starts with the same Symbiota active sourdough starter you already know and love. Then we layer in cocoa powder, a little extra sugar, and generous chunks of dark chocolate. The final loaf is not too sweet but absolutely feels like a treat – hot and buttered – it’s perfect for family brunch, or a late‑night sneaky slice.

If you’ve already made the Symbiota Easy Whole Wheat Sourdough Bread, this recipe will feel familiar. Same rhythm. Same bulk fermentation. Same stretching and folding techniques. Just a new, rich chocolate flavour and pockets of melted chocolate tucked into the crumb.

What to expect from Chocolate Sourdough

Chocolate sourdough isn’t cake. It’s still real bread, but with a crisp crust and a slightly chewy slice that is rich in cocoa flavours. The light touch of sugar brings enough sweetness to make it feel special, but still with that signature sourdough tang humming in the background.

Tips for a great Chocolate Sourdough

These tips echo the techniques we taught in the whole wheat sourdough recipe, with a few chocolate‑specific tweaks:

Starter strength is everything.

Use a lively, active sourdough starter that is bubbling and doubling at room temperature before you start. If it’s sluggish, feed it again and give it warmth and time to wake up fully.

White bread flour for structure.

Cocoa powder and chocolate add richness, but at a cost. There are extra demands on the dough, more moisture is needed, and a strong flour. Using a strong bread flour helps keep the loaf structure elastic, so that it can rise well despite the stressing additions of cocoa and chocolate.

Cocoa changes the dough.

Cocoa powder is very thirsty and absorbs a lot of moisture. Expect the dough to feel a stiffer than the usual white sourdough, and that it will need more water than you would ordinarily use. If it feels too dry, splash extra fresh water onto the dough during mixing until it comes together smoothly. If you add too much water, balance that with a little extra flour and cocoa.

Chocolate last, and gently.

Add the chopped chocolate during the very last set of stretches and folds, once the gluten has already developed. This will keep the chocolate where you want it in the loaf, instead of the chocolate sinking or melting into the dough too early, and so that the chocolate doesn’t accumulate when you are shaping the dough.

Respect time and temperature.

Bulk fermentation still happens at room temperature, usually in the range of 4–6 hours depending on how warm your kitchen is. If your room is cooler, lean to the longer end of the fermentation period or use a heat mat to help keep the starter warm.. If your room is warm, keep an eye on the dough and move to the next steps sooner so that the dough doesn’t over‑ferment.

Use a Dutch oven if you can.

A preheated Dutch oven traps steam for the first part of the bake, helping the loaf spring and giving that glossy, blistered crust. After baking for 20 minutes with the lid on, remove the lid to let the crust set and deepen in colour. If you don’t have a Dutch oven available, you can make a high tent with tin foil over the loaf just before baking to recreate a steamy environment.

Tools you’ll need

You can bake this chocolate sourdough with the same toolkit as your whole wheat loaf:

• Large mixing bowl
• Kitchen scales
• Dough scraper or spatula
• Proofing basket (or a bowl lined with a kitchen towel or parchment)
• Dutch oven (or heavy baking dish with a lid, or a tinfoil tent)
• Bread lame or very sharp knife
• Clean kitchen towel or muslin
• Wire rack to cool the finished loaf

Ingredients for Chocolate Sourdough (single loaf)

This makes one medium loaf of chocolate sourdough bread.

• 150 g active sourdough starter (fed and bubbly)
• 500 g bread flour (strong white flour)
• 70 g cocoa powder (unsweetened)
• 70 g sugar (for a gently sweet, treat‑level loaf)
• 10 g non‑iodised salt (Himalayan or sea salt)
• 150 g dark chocolate chunks or chocolate chips
• Handful of milk chocolate chips for added depth and sweetness
• lukewarm filtered or spring water

The exact water amount will depend on how absorbent the flour and cocoa are. Start at the lower end and add more if the dough feels too dry to come together.

How to make Chocolate Sourdough (full method)

1. Feed the starter.

Make sure the starter is lively before you begin. Feed the Symbiota active sourdough starter according to the usual ratios and let it sit in a warm spot until it is bubbly and has increased in size. When it’s at or near its peak, you’re ready to bake.

2. Autolyse the base ingredients.

In a large bowl, combine:

• 500 g bread flour

• 70 g cocoa powder

• 70 g sugar

• 350 ml lukewarm water to start

Mix until there are no dry patches of flour or cocoa powder. The dough will look dark and shaggy. If it feels very stiff and dry, add extra water, a tablespoon at a time, until the dough comes together. Cover the bowl and let it rest for 30 minutes. This autolysis step will let the flour and cocoa hydrate and make it much easier to work with the dough later.

3. Add the starter and salt.

After the autolyse period, add:

• 150 g active sourdough starter

• Sprinkle in 10 g salt

Mix with your hands or a dough scraper until the starter and salt are fully incorporated. The dough will be sticky at first; keep folding and pressing until it feels cohesive. If needed, lightly wet your hands to prevent sticking rather than adding more flour.

4. First bulk ferment.

Cover the bowl and leave the dough at room temperature for bulk fermentation. Aim for a total of 4–6 hours, depending on how warm the kitchen is.

5. Stretch and fold.

Stretch and fold every 30 minutes for 2 hours. Slide your hand under the dough at one side, gently pull it up, then fold it over toward the centre. Rotate the bowl and repeat on all four “sides”. This strengthens the gluten without kneading. The dough will gradually become smoother and more elastic as you work through these sets.

6. Add the chopped chocolate.

Once the dough is already showing some strength (usually after the first or second set of stretches and folds), scatter the chopped chocolate over the dough:

• 120–150 g of chopped dark chocolate 

Perform one single set of stretches and folds to gently tuck the chocolate into the dough. Try to keep the chocolate pieces mostly inside the dough rather than sitting on the surface. This prevents burning during baking and gives lovely pockets of melted chocolate throughout the loaf.

7. Second bulk ferment.

Continue the bulk fermentation until the dough has risen noticeably, feels airy, and jiggles slightly when you move the bowl. It may not fully double, but it should look and feel lighter.

8. Rest and final shape.

Lightly flour the work surface, then turn the dough out very gently, trying not to knock out too much air. Let it rest, uncovered, for 20 minutes. This short rest relaxes the gluten and makes final shaping easier. 

• For a round loaf:

Use gentle tension to pull the dough toward you in small motions, tightening the surface without tearing it.

• For an oval loaf:

Very gently fold the top third of the dough down, then the bottom third up, and roll it gently so the seam side ends up underneath when it goes into the proofing basket.

9. Final proof (room temperature or fridge)

Place the shaped dough seam side up in a floured proofing basket or a bowl lined with overly long parchment paper. Cover the basket with a clean kitchen towel or muslin. You have two options:

Same‑day bake:

Proof at room temperature for 2–4 hours until the dough looks puffy and slightly expanded.

Overnight proof:

Place the covered basket in the fridge for 8–12 hours. This slow, cool proof deepens the chocolate and sourdough flavours and can make scoring easier.

10. Preheat the Dutch oven.

When you’re about 30 minutes to 1 hour away from baking, place the Dutch oven (with lid) into the oven and preheat to 230° C. Give both the oven and Dutch oven time to get fully hot. The trapped steam in the first part of the bake helps create that classic sourdough crust and a good oven spring.

11. Score and bake.

When the oven is fully preheated:

• Carefully remove the hot Dutch oven or baking pan from the oven and take off the lid.
• Gently lift the proofed dough into the hot pan using the long edges of the parchment paper.
• Using a bread lame or sharp knife, score the top of the dough with a confident slash, about 1–2 cm deep.
• Cover the pan with the lid or a tinfoil tent and place it back into the oven.

12. Steam, then bake for crust.

Bake the loaf with care and attention. The chocolate in the loaf will make the crust look darker than a plain sourdough, so use both colour and aroma as your guide. 

• Covered (steaming): 

20 minutes at 230° C with the lid on. 

• Uncovered (crusting): 

20-25 minutes at 205° C without a lid. 

13. Cool on a wire rack to set the crumb.

Once baked, carefully lift the loaf out of the Dutch oven using the parchment paper, and place the loaf on a wire rack to cool completely. It’s tempting to slice straight in but give it at least an hour. Cooling allows the crumb to set and the chocolate to firm up slightly, which makes for cleaner slices and a better texture.

Final thoughts

This chocolate sourdough bread recipe makes one of those “special” loaves that you can whip out for when the extended family come to visit. This recipe should feel familiar to you – it uses the same active sourdough starter, bulk fermentation, sets of stretches and folds, and Dutch oven baking techniques that you already know. Just this time we have the fun additions of cocoa, sugar, and dark chocolate chunks. After your first ever chocolate sourdough loaf, you’ll find it on your regular recipe rotation for holidays, gifts, or just because it’s really, really yum.