Liu Sha Bao (Salted Egg Yolk Lava Steamed Buns)

Soft and fluffy steamed buns are filled with savory and sweet molten lava salted egg yolks custard filling that will gush out as soon as you take that first bite. All the tips you need to know.

I remember eating salted duck eggs with a bowl of rice congee often as a kid. It’s something that is so simple, but yet it’s my favorite. In case you have never tried salted duck eggs (or salted eggs for that matter), the white of the eggs are extremely salty but the yolks, the yolks have that hint of sweetness and just the right amount of savoriness, which I love. It’s something that I don’t know how to describe and I often just describe it as being umami in this modern day.

WHAT IS LIU SHA BAO?

Liu sha (流沙) literally means quicksand in Mandarin. In this case liu sha bao means that the filling is flowing like a molten lava. The filling is made with butter, salted egg yolks, milk powder, and sugar. When it is served warm, the filling will gush out with that first bite revealing its sweet, savory, milky, buttery taste of custard. The salted egg yolks really add that extra kick to it. I’ve made liu sha bao using coconut oil instead of butter too and it turned out just great if you are wondering what you can substitute for the butter.

WHY YOU’LL LIKE THIS RECIPE

1. Smooth, soft, and fluffy steamed buns
2. Easy, no-fuss recipe for the filling
3. Yes, the filling flows when it’s warm

HOW TO MAKE LIU SHA BAO FROM SCRATCH

1. PREPARE THE FILLING
I recommend doing this the day before. Steam the egg yolks for about 5 minutes over high heat and then mash with a fork

Place the softened butter or coconut oil in a large mixing bowl

Add sugar and mix until combined

Add milk, mashed egg yolk and stir in the milk powder and mix until combined

The filling will be still quite runny

You can scoop it into a silicone ice cube tray or whatever mould you have for easier shaping. Let them freeze for at least 1 hour or until the next day

2. PREPARE THE DOUGH
Start with this basic soft and fluffy steamed buns recipe
Cover and let the dough rest for 15 minutes

3. WRAPPING
Divide the dough into 10-12 equal pieces

Work with one piece at a time and cover the rest to prevent drying.

Flatten the dough with your palm and use a small rolling pin to roll into a circle about 5-6 inch in diameter and the middle is thicker. Don’t roll the dough out too thin too

Place the frozen filling ball in the center of the wrapper

Gather all the sides to the middle

Pinch to seal securely so the filling won’t leak when you steam

Place it on a parchment paper seam side down. Continue with the rest and place the bao on a large tray cover with a large clean towel

4. PROOFING
Let the dough proof at a warm place until they are about 50% of original size. This may take somewhere from 30 minutes to 1 hour or longer. Don’t go by the time but feel and test the dough to see if they are proofed enough
The shaped buns will feel lighter and when you gently push it with your finger, it will slowly spring back. They are ready to be steamed

5. STEAMING
Bring the water in a steamer to a boil. Wrap the lid with a cloth. This will prevent water dripping from the lid and create burn spots. LOWER THE HEAT TO MEDIUM. Place the buns in there, leaving about 1-inch space in between. Cover with a lid but leaving it about 1/4-inch gap for some steam to escape. Steam on medium heat for 8 minutes.

Then wait 5 minutes before removing the buns from the steamer and serve when they are warm

HOW TO ENJOY LIU SHA BAO

No, you don’t need a 10-page manual to eat this liu sha bao. But it can be a pretty messy business trying to eat this bun though I must warn you. I took that small first bite and with the bun still in the mouth, gently suck in the flowing custard into my mouth so they won’t be dripping and continue with the rest 😉

I originally made this recipe with pandan-flavored steamed buns (as shown in the photo below). Pandan steamed buns are just amazing! Well, pandan-flavored anything is good for me LOL!

FILLING IDEA BESIDES SALTED EGG YOLKS

If you don’t want to use salted egg yolks, you can also substitute with mashed sweet potatoes, mashed taro, mashed ube yam, mashed pumpkin, etc. Refer to the recipe card for how much to use.

DID YOU MAKE THIS LIU SHA BAO RECIPE?

I love it when you guys snap a photo and tag to show me what you’ve made 🙂 Simply tag me @WhatToCookToday #WhatToCookToday on Instagram and I’ll be sure to stop by and take a peek for real!

*Recipe is updated by decreasing the amount of milk a little bit and video and new photos are added*

Liu Sha Bao (Salted Egg Yolk Lava Steamed Buns)

5 from 2 votes

10 large buns

Prep: 1 hour

Cook: 34 minutes

Total: 1 hour 34 minutes

Soft and fluffy steamed buns are filled with savory and sweet molten lava salted egg yolks custard filling that will gush out as soon as you take that first bite

For baking/ kueh making: I highly encourage to weigh ingredients with a digital kitchen scale instead of using measuring cups as they are not very accurate especially when it comes to recipe that requires precision.

GRAMS TO CUPS CONVERSION (UNSIFTED)

INGREDIENTS

Dough:

• ▢ 300 gr all-purpose flour - About 2 cups + 2 1/2 Tbsp (unsifted), plus more for dusting as needed. see notes 1
• ▢ 60 gr Wheat starch - about 1/2 cup (unsifted), or use cornstarch or potato starch (not potato flour)
• ▢ 4 gr instant yeast - about 1 1/4 tsp
• ▢ 60 gr sugar - about 5 Tbsp
• ▢ 1 Tbsp cooking oil
• ▢ 200 ml milk - about 13 Tbsp or use pandan juice for pandan flavor

Filling (recommended to prepare one day before):

• ▢ 100 gr butter (softened) or sub with coconut oil (which I did) - 7 Tbsp
• ▢ 60 gr regular fine sugar - 5 Tbsp
• ▢ 4 salted egg yolks - about 70 grams. see notes 2
• ▢ 30 ml whole milk - 2 Tbsp
• ▢ 80 gr milk powder - 1/2 cup + 1 1/2 Tbsp

INSTRUCTIONS

Preparing the filling:

• Steam the egg yolks for about 5 minutes over high heat and then mash with a fork
• Place the softened butter or coconut oil in a large mixing bowl, add sugar and mix until the color is pale (if using butter. Color will be the same with coconut oil) with a whisk or you can use a mixer if it's easier. Add milk, mashed egg yolk and stir in the milk powder and mix until combined
• The filling will be still quite runny. You can scoop it into a silicone ice cube tray or whatever mould you have for easier shaping. Aim for 10 pieces (depending on how small or big you want to make the steamed buns). If you don't have any, place this in the freezer for 10 minutes. It will harden it a little bit and you can use a spoon to scoop and place this on top of baking tray or a plate lined with parchment paper and put them in the freezer and let it freeze for at least 1 hour. I did mine overnight

Preparing the dough with a machine:

• Place the flour, instant yeast, sugar, and cooking oil in a mixing bowl. If you are using a stand mixer, use a dough hook attachment. Gradually add liquid. If the dough still a bit dry, add a bit of water or milk. Add more teaspoon by teaspoon until the dough comes together and continue to knead for 5 minutes

Prepare the dough by hands:

• If you are kneading by hands, mix everything until you get a rough dough (it's not going to be smooth yet). Cover and rest it for 15 minutes. Then go back and knead it. You'll be surprised by how easier it is to knead it now. Knead until the dough is smooth and pliable, about 10-15 minutes. Add liquid as needed. At any point during kneading, you can always stop and rest the dough if you find it hard to knead. This is to relax the gluten. Then go back to knead again and you'll be surprised by the difference it makes by just resting the dough before kneading again. It's easier for you too

Rest the dough:

• Cover and rest the dough for 15 minutes. This is not to proof the dough. It shouldn't double in size. This is to relax the gluten for easier shaping and rolling the dough

Wrapping:

• Place the dough on a lightly floured surface. Roll into a long log and then divide equally into 10 pieces. Work with one piece at a time and cover the rest to prevent drying. Flatten the dough with your palm and use a small rolling pin to roll into a circle about 5-6 inch in diameter and the middle is thicker. Don't roll the dough out too thin too. Place the frozen filling ball in the center of the wrapper and gather all the sides to the middle and pinch to seal. Place it on a parchment paper seam side down. Make sure to seal it securely so the filling won't leak when you steam. Continue with the rest and place the bao on a large tray cover with a large clean towel

Proofing:

• Let the dough rise at room temperature or at a warm place.  If it's winter where you are, you can use your oven "bread proof" function to let them proof in there, or simply turn on your oven to the lowest temperature and then turn off and after 15 minutes, place the shaped buns in there to let them proof. They won't necessarily double in size, but at least puff up to about 50% of the original size. This may take about 30 mins to 1 hour at a warm temperature. Don't go by the time however. The buns will feel lighter and when you push it gently with your finger, it will spring back slowly. These buns are ready to be steamed
• For these steamed buns, they will tend to widen to the side a bit because the filling inside the buns have softened during the proofing process, that's normal

Steaming:

• Bring the water in a steamer to a boil. Wrap the lid with a cloth. This will prevent water dripping from the lid and create burn spots
• LOWER THE HEAT TO MEDIUM. Place the buns in there, leaving about 1-inch space in between. Cover with a lid but leaving it about 1/4-inch gap for some steam to escape. Steam on medium heat for 8 minutes
• Once the buns are done steaming, turn off the heat and wait for 5 minutes before opening the lid so the buns will not collapse or wrinkle due to sudden change in temperature.

Serving:

• They are best when served warm. Warn whoever that is eating this that the filling is HOT and it's flowing too (like a lava!)

Storing:

• Once the steamed buns have cooled down completely, place them on a baking sheet and put them in a freezer for about 1 hour. They won't be frozen yet, but firm enough. Transfer to a freezer bag and they won't stick to each other anymore. They can be kept in the freezer for up to 1 month for best result. You can thaw them overnight in the fridge and then steam them for 5 minutes to reheat or steam them from frozen for 10 minutes or until heated through

Video

Notes

1. You can also replace all of all-purpose flour with 360 gr of cake flour or premixed Hongkong/Vietnamese bao flour and omit the wheat starch/corn starch.
2. You can replace salted egg yolks with same amount of mashed sweet potatoes, mashed taro, mashed ube, mashed pumpkin, etc

RECOMMENDED PRODUCTS:

Kitchen Aid Standmixer

Dough Hook Attachment

Food Steamer

Tried this recipe? I would love to see it!Tag @WhatToCookToday and hashtag #WhatToCookToday

You also need to check out this quick method for making salted eggs. I like to use this method because I can use the egg whites for other things and the salted egg yolks for this recipe any many other recipes calling for salted egg yolks.