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Hounö blog

The ultimate guide to steaming bao buns in Invoq Combi oven 

Learn step by step to steam bao buns in an Invoq Combi oven with the right balance of humidity and temperature. Enjoy fluffy bao buns with perfect results every time!

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the ultimate guide to steaming bao buns in invoq combi oven 
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21 April 2025

Steaming bao buns to perfection requires the right balance of humidity, temperature, and timing. Traditionally, this is achieved using bamboo or metal steamers, but professional kitchens and bakeries are now turning to combi ovens for their superior control and efficiency. With an industrial oven like the Invoq combi oven, you can achieve consistently light, fluffy, and flavorful bao buns while streamlining your workflow. In this guide, we’ll walk you through the step-by-step process of steaming bao buns in an industrial oven, explore the benefits over traditional steaming methods, and share troubleshooting tips to help you master the art of bao-making. 

  Benefits of using a combi oven vs. traditional steaming methods  

Many kitchens still rely on bamboo or metal steamers, but they come with limitations. A combi oven like the Invoq offers superior control, efficiency, and hygiene, making it the perfect industrial oven for high-volume production. 

Superior control, efficiency & hygiene

Steaming in Invoq Combi oven

  • Precise humidity control: Unlike bamboo or metal steamers, the Invoq combi oven maintains consistent humidity levels, preventing buns from becoming too dry or too dense.
  • Higher capacity and efficiency: Batch-cook large quantities at once without overcrowding steamers.
  • Automated cooking programs: Reduce manual monitoring and ensure consistency across every batch.
  • Improved hygiene and cleaning: No risk of moldy bamboo steamers or uneven heating from metal steamers. The oven’s self-cleaning function ensures sanitary operation.
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Step-by-step process for steaming bao buns perfectly 

Steaming bao buns is a delicate process that involves careful proofing, precise steaming conditions, and optimal handling. With a combi oven, you can control every step to ensure a consistent and professional result. 

Step 1

Proofing the dough

Before steaming, bao buns need to proof in a warm, humid environment. The Invoq combi oven allows precise humidity control for consistent results.

Step 2

Preheat the oven

Set the Invoq combi oven to a steaming mode with 100% humidity and a temperature of 100°C.

Step 3

Arrange the bao buns

Place the buns on perforated trays, ensuring they have enough space to expand.

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Step 4: Steam to perfection

Steam the buns for approximately 8-10 minutes, depending on their size and filling.

Step 5: Serve or store

Once steamed, bao buns are best enjoyed fresh, but they can also be kept warm without drying out. Use a holding cabinet or the Invoq combi oven in combi mode with a touch of steam. Set the oven to 50-60°C with continuous time, ensuring the perfect balance of warmth and moisture to maintain their soft, pillowy texture until serving.

Soft & fluffy

Bao buns

Get the full recipe crafted by our Invoq Chef team. Learn how to make soft and fluffy bao buns in Invoq Combi oven.

Full bao buns recipe
Bao_Invoq

The secret weapon of making soft and fluffy bao buns

How humidity control improves texture and consistency

The secret to a soft, fluffy bao bun is moisture retention. The Invoq combi oven’s injection steam technology ensures: 

– Even distribution of steam, preventing dry spots. 
– Customizable humidity levels to suit different bao dough recipes. 
– Consistency in texture, whether making classic or innovative bao varieties. 
By controlling the humidity in an industrial oven, you can ensure that every bao bun has the same light and airy texture, without overcooking or drying out. 

Creative bao bun fillings 

Bao buns are a versatile dish that can be filled with an endless variety of ingredients. From traditional fillings to bold, modern creations, there is a bao bun for every palate. 


Classic vs. innovative fillings 

While traditional bao buns feature fillings like char siu (BBQ pork), modern chefs are experimenting with unique flavors: 

  • Korean fried chicken bao: Crispy chicken, gochujang sauce, and pickled daikon.
  • Crispy tofu and miso glaze: A vegetarian option balancing crunch and umami.
  • Spiced jackfruit and mango salsa: A vegan take with tropical flavors. 

Balancing flavors and textures  

When crafting bao fillings, consider: 

  • Contrast: Soft bun with crunchy fillings.
  • Acidity and fat: Balance richness with pickled or fresh elements.
  • Heat and sweetness: Complement spice with a touch of sweetness. 

Troubleshooting and pro tips 

Even with the best equipment, mistakes can happen. Here are some pro tips to help you troubleshoot common issues and achieve flawless bao buns every time.


Avoiding common pitfalls  

  • Dry or dense buns? Increase humidity during proofing and steaming.
  • Undercooked centers? Ensure buns have enough space to expand.
  • Sticky buns? Use perforated trays and parchment paper to prevent sticking. 

The role of proofing and steam in achieving soft texture   

  • Proof at 35-38°C with 75-85% humidity for best results. 
  • Proper proofing ensures buns stay light and airy when steamed. 

How to batch-cook bao buns consistently in a professional kitchen 

  • Use the Invoq combi oven’s programmable settings to maintain uniformity.
  • Steam multiple trays at once without affecting quality.

Why combi ovens are a game-changer for high-volume production

For restaurants and bakeries producing large quantities of bao buns, a commercial oven is essential for efficiency, consistency, and cost savings. 


Increasing efficiency in restaurant or bakery settings  

  • Cook large batches quickly without compromising quality.
  • Automate the steaming process for consistency. 

How a combi oven streamlines steaming, proofing, and even toasting  

  • Proof, steam, and finish bao buns in one appliance.
  • Use gentle heat modes to lightly crisp or toast buns for unique textures. 

Cost savings and workflow benefits 

  • Save energy and water with efficient steaming technology. 
  • Reduce labor costs by minimizing manual monitoring. 

Not just for bao: Other creative dishes you can make with the same steaming technique

The combi oven isn’t just for bao buns – it can be used for a range of steamed delicacies, both sweet and savory.


Soft Asian breads

  • Mantou: Traditional Chinese steamed buns, perfect for dipping. 
  • Hirata buns: Folded buns, ideal for filling with savory ingredients.

Western steamed delicacies

  • Steamed brioche: A soft, airy alternative to baked brioche.
  • Steamed pudding: Classic desserts like sticky toffee pudding. 

Healthier alternatives  

  • Vegetable-based steamed breads: Infuse dough with pumpkin, beetroot, or spinach for vibrant, nutritious options. 

Mastering bao buns in HOUNÖ Invoq Combi oven

It will not only guarantee perfect texture and efficiency but also opens the door to creative possibilities.  Explore our HOUNÖ Invoq Combi oven models, and read the next steamed bread and pastry article to get inspired more.

Happy cooking with Invoq!  

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