As I pulled my first batch of Sourdough Bao Buns from the steamer, an intoxicating aroma filled my kitchen—soft, fluffy clouds of goodness with a hint of tanginess. These beauties offer a delightful twist on traditional bao, using a sourdough starter instead of yeast, which lends depth and character to every bite. What’s great about this recipe is its perfect balance of ease and flavor; you’ll impress friends and family without spending all day in the kitchen. Plus, these buns are incredibly versatile, ready to cradle your favorite fillings, whether it’s savory pulled pork or seasoned jackfruit. Who knew something so scrumptious could be so simple? Ready to dive into this delightful recipe for Sourdough Bao Buns? Let’s get cooking!

Why are Sourdough Bao Buns a Must-Try?
Soft, Fluffy Perfection: These buns are incredibly light and airy, making them the perfect base for any filling.
Unique Flavor: The use of sourdough adds a delightful tang that traditional bao can’t match.
Quick and Easy: With a streamlined process, these bao come together faster than you think.
Versatile Fillings: Whether you crave savory pulled meats or vegan delights like seasoned jackfruit, the options are endless!
Impress Guests: Serve these at your next gathering, and watch them disappear quickly!
Try pairing them with some delicious side dishes for a complete meal that will leave everyone singing your praises.
Sourdough Bao Buns Ingredients
• Get ready to savor every fluffy bite!
For the Dough
- Sourdough Starter – Essential for leavening and flavor development; make sure it’s active for best results.
- All-Purpose Flour – Provides structure; unbleached flour is preferred for a lovely texture, but strong flour works for a chewier bun.
- Cornstarch – Softens the dough for a lighter bun; can be swapped with tapioca or arrowroot if needed.
- Granulated Sugar – Aids fermentation and adds a subtle sweetness; feel free to omit for a less sweet flavor.
- Salt – Enhances overall flavor; a crucial balance ingredient.
- Baking Powder – Gives an extra lift during steaming for ultimate fluffiness.
- Olive Oil – Adds moisture and richness, contributing to a tender texture.
- Lukewarm Water – Activates the dry ingredients and helps form the dough.
These soft and fluffy Sourdough Bao Buns are truly delicious, so get ready to impress your taste buds and your guests!
Step‑by‑Step Instructions for Sourdough Bao Buns
Step 1: Prepare the Starter
Begin your Sourdough Bao Buns journey by feeding your active sourdough starter in the morning. Allow it to sit in a warm place for about 4 to 6 hours until it becomes bubbly and doubles in size. This ensures maximum leavening power, which is essential for creating the soft, fluffy texture you’re aiming for.
Step 2: Mix Dough
In a large mixing bowl, combine your bubbly sourdough starter with all-purpose flour, cornstarch, granulated sugar, baking powder, and salt. Gradually add lukewarm water and mix with a fork until the ingredients start to come together. Switch to hand kneading for about 5-7 minutes, until the dough is smooth and slightly tacky, ensuring a delightful texture in your bao buns.
Step 3: First Rise
Once your dough is mixed, cover the bowl with a damp kitchen towel or plastic wrap. Place it in a warm area to rise for about 4 hours, allowing it to expand by at least 50%. You’ll know it’s ready when the dough is noticeably puffed up and slightly domed, setting the stage for light, airy Sourdough Bao Buns.
Step 4: Cold Proof
After the first rise, gently punch down the dough to release excess air. Tightly cover the bowl with plastic wrap and refrigerate it overnight. This cold proofing step, lasting about 8-12 hours, enhances the flavor and texture of your Sourdough Bao Buns, making them irresistibly fluffy.
Step 5: Shape Buns
The next day, remove the dough from the refrigerator and let it sit at room temperature for about 30 minutes. Roll the dough out on a floured surface until about half an inch thick. Cut out circles using a biscuit cutter, and fold each one in half, resting them on a tray lined with parchment paper for about 10 minutes to relax the gluten.
Step 6: Second Rise
Cover the shaped bao buns with a towel and let them rise for another 30-45 minutes until they are puffy and soft. This final rise is crucial for achieving that beautiful fluffiness, so keep an eye on them to ensure they have doubled in size again.
Step 7: Steam Buns
Prepare your steamer and bring water to a gentle simmer over medium heat. Carefully place the buns in the steamer, ensuring they have space to expand. Steam your Sourdough Bao Buns for about 10-12 minutes, or until they look puffy and are cooked through, you’ll know they’re done when they spring back lightly when pressed.
Step 8: Serve
Once steamed, remove the Sourdough Bao Buns from the steamer and let them cool briefly before serving. These delightful, warm buns are now ready to be stuffed with your favorite fillings, offering a soft and fluffy experience that you won’t want to miss!

Make Ahead Options
These Sourdough Bao Buns are perfect for meal prep enthusiasts! You can prepare the dough and cold proof it in the refrigerator up to 24 hours in advance, allowing the flavors to develop beautifully. After the first rise, simply punch down the dough, cover it tightly with plastic wrap, and refrigerate. When you’re ready to enjoy these delightful buns, remove the dough from the refrigerator and let it sit at room temperature for about 30 minutes before shaping and letting it rise again. This makes finishing your Sourdough Bao Buns a breeze while ensuring they turn out just as fluffy and delicious!
What to Serve with Sourdough Bao Buns
Discover the perfect accompaniments to elevate your Sourdough Bao Buns into a delightful meal experience.
- Sticky Pulled Pork: The sweet and savory flavors meld beautifully with the fluffy bao, creating a heavenly bite.
- Seasoned Jackfruit: A great plant-based filling that boasts a savory, slightly sweet profile, making it a fabulous vegetarian option.
- Crispy Asian Slaw: This refreshing side adds a crunchy contrast and bright flavors that pair perfectly with your soft buns.
- Spicy Chili Sauce: A dollop of heat can take your bao experience to the next level, adding depth and a kick of flavor.
- Steamed Bok Choy: The lightness of steamed bok choy complements the fluffy buns while introducing a fresh, green element.
- Soy Sauce Dipping: Simple yet effective, a small bowl of soy sauce enhances every flavor packed inside these soft bao.
- Sweet Chili Sauce: This sweet and tangy sauce creates a delightful fusion, enhancing the bao’s flavor with a subtle zing.
- Tea or Soda Pairing: To hydrate your meal, serve with some jasmine tea or a light soda for a refreshing finish.
- Chocolate Mochi: For dessert, the chewy texture and subtle sweetness of mochi offer a delightful end to your meal.
- Coconut Milk Pudding: The creaminess of this dessert balances the savory flavors, concluding your feast on a sweet note.
Storage Tips for Sourdough Bao Buns
Room Temperature: Keep your Sourdough Bao Buns in an airtight container at room temperature for up to 1 day to maintain their softness.
Fridge: If you need to store them longer, place the buns in the refrigerator in an airtight container for up to 3 days; however, they may lose some fluffiness.
Freezer: Freeze individual buns by wrapping them tightly in plastic wrap and then in aluminum foil for up to 2 months. Thaw in the fridge overnight when ready to enjoy.
Reheating: Reheat by steaming for about 5-7 minutes to regain that soft, fluffy texture; avoid microwaving as it may make them tough.
Sourdough Bao Buns Variations & Substitutions
Feel free to let your culinary creativity shine by customizing these delightful buns with these tempting substitutions and variations!
- Dairy-Free: Substitute olive oil with coconut oil for a tropical hint and extra moisture, perfect for a vegan version.
- Whole Wheat: Use whole wheat flour instead of all-purpose flour for a nutty flavor and added fiber; just adjust the water content a little.
- Gluten-Free: Swap all-purpose flour with a gluten-free blend and add xanthan gum for structure; perfect for gluten-sensitive friends.
- Spicy: Incorporate red chili flakes or sriracha into the dough for a delightful heat that pairs beautifully with savory fillings.
- Herb-Infused: Mix in fresh herbs such as chopped scallions or dill into the dough for a fragrant twist that enhances every bite.
- Sweet Option: Add chocolate chips or dried fruit like raisins into the dough for a sweet variant, making delectable dessert bao!
- Savory Filling: Try stuffing with marinated mushrooms, sautéed greens, or spiced lentils for a delicious vegetarian option that packs a flavor punch.
Embrace the endless possibilities with your Sourdough Bao Buns! You can even explore other recipes for Pulled Pork Sliders or Pulled Jackfruit Tacos to accompany these fluffy delights in a delicious meal!
Expert Tips for Sourdough Bao Buns
- Active Starter Required: Ensure that your sourdough starter is bubbly and at its peak for optimal leavening and flavor in your bao buns.
- Flour Variations: While all-purpose flour works best, feel free to experiment with strong flour for chewier buns, but don’t exceed the recommended amounts.
- Perfect Proofing: Don’t skip the cold proofing step, as it enhances the depth of flavor in your Sourdough Bao Buns; if short on time, at least allow a warm rise.
- Steaming Space: Make sure to leave enough space between buns in the steamer to prevent them from sticking together, ensuring they stay fluffy.
- Prevent Sticking: Use parchment paper lining in your steamer baskets to avoid sticking, which can ruin the beautiful shape of your bao buns.

Sourdough Bao Buns Recipe FAQs
What kind of sourdough starter should I use?
Absolutely! Make sure your sourdough starter is active and bubbly. If it’s been sitting in the fridge, feed it a few hours beforehand to ensure it’s at its peak for leavening. This is crucial; a weak or inactive starter will lead to dense buns.
How should I store the Sourdough Bao Buns?
To keep your Sourdough Bao Buns soft, store them in an airtight container at room temperature for up to 1 day. For longer storage, you can refrigerate them for up to 3 days, but note that they may lose some fluffiness. If you want them to last beyond that, freeze them!
Can I freeze Sourdough Bao Buns?
Certainly! To freeze your Sourdough Bao Buns, wrap each one tightly in plastic wrap, then place them in a resealable bag or an airtight container. They can be frozen for up to 2 months. When ready to enjoy, thaw them in the fridge overnight and steam for 5-7 minutes to restore their delightful texture.
What can I do if my dough doesn’t rise properly?
If your dough isn’t rising, check if your sourdough starter was active enough. Additionally, rising may be impacted by the room temperature; a warmer environment generally encourages better fermentation. If necessary, give it more time, or try placing the dough in a turned-off oven with a light on to create a draft-free, warm environment.
Are Sourdough Bao Buns pet-friendly?
While the ingredients for Sourdough Bao Buns are generally safe, it’s better to avoid sharing them with pets. The addition of salt and sugar can be harmful, particularly in larger quantities. Always make sure to keep your furry friends away from any baked goods that aren’t specifically made for them!

Soft Sourdough Bao Buns for Your New Favorite Snack
Ingredients
Equipment
Method
- Prepare the Starter: Feed your active sourdough starter and let it sit for 4 to 6 hours until bubbly.
- Mix Dough: Combine sourdough starter, all-purpose flour, cornstarch, sugar, baking powder, and salt. Add lukewarm water gradually and knead for 5-7 minutes.
- First Rise: Cover the bowl and let the dough rise in a warm area for about 4 hours until expanded by at least 50%.
- Cold Proof: Punch down the dough, cover tightly, and refrigerate overnight for 8-12 hours.
- Shape Buns: Roll out the dough, cut circles, fold in half, and let them relax for 10 minutes.
- Second Rise: Cover shaped buns and let them rise for 30-45 minutes until puffy.
- Steam Buns: Steam the buns for 10-12 minutes until puffy and cooked through.
- Serve: Let the buns cool briefly and enjoy stuffed with your favorite fillings.
