Steamed Egg Custard Bun Recipe: Fluffy Pillows With Sweet Savory Surprise

These steamed buns deliver a perfect balance of soft, pillowy dough and rich, creamy custard in every bite. The technique ensures fluffy texture without density.

I developed this method to create consistent results at home, with precise steaming times for ideal doneness. The custard filling stays luscious and centered in each bun.

Ingredients for Steamed Egg Custard Bun

These simple ingredients create pillowy steamed buns with luscious custard centers at home.

The flour is foundation—King Arthur or Bob’s Red Mill give consistent results. Yeast freshness is critical (check expiration dates). Whole Foods and Trader Joe’s have reliable bulk bins for custard powder. For the custard filling, organic heavy cream yields the richest texture. Butter should be unsalted so you control the salt content precisely in both dough and filling.

No custard powder? Instant vanilla pudding mix works identically—just check it’s the cook-and-serve type. Out of heavy cream? Half-and-half plus a splash of melted butter gets you close. The egg yolks are non-negotiable for custard richness (save the whites for meringues). For a lighter dough, bread flour at half the amount adds chew without density.

Dough rises best in a warm spot (75-80°F). Unbaked buns freeze beautifully on parchment-lined trays—3 months max. Baked buns keep 2-3 days in an airtight container. Re-steam for 2-3 minutes to revive texture (don’t microwave).

Step-by-Step Instructions for Steamed Egg Custard Bun

These clear, tested steps will guide you through creating perfect custard-filled buns with a soft, pillowy texture.

Step 1: Prepare and Proof the Dough

In a large bowl, whisk together the 2.25 tsp Active Dry Yeast with the 0.75 cup Warm Water at 110°F. Let it sit for 5-7 minutes until foamy. This confirms the yeast is active and ready to leaven your dough.

Add the 2 cups All-Purpose Flour, 0.25 cup Granulated Sugar, 0.25 cup Whole Milk, 2 tbsp Unsalted Butter (melted and cooled), 1 whole Large Egg, and 0.5 tsp Salt. Mix until a shaggy dough forms, then knead on a lightly floured surface for 8-10 minutes until smooth and elastic.

Place the dough in a greased bowl, cover with a damp towel, and let it rise in a warm place for 1-1.5 hours or until doubled in size. The dough should spring back slowly when pressed with a finger.

Step 2: Make the Custard Filling

In a separate bowl, combine the 0.25 cup Custard Powder, 0.25 cup Heavy Cream, 2 whole Egg Yolks, and 1 tsp Vanilla Extract. Whisk until smooth and free of lumps. The mixture should be thick but pourable.

Add the remaining 0.25 cup Granulated Sugar and 0.5 tsp Baking Powder, mixing until fully incorporated. Chill the custard filling in the refrigerator for 20-30 minutes to thicken slightly. This makes it easier to shape and prevents it from leaking during steaming.

Step 3: Shape the Buns

Once the dough has doubled, punch it down and divide it into 4 equal portions. Roll each portion into a smooth ball, then flatten into a 3-inch circle with a rolling pin, leaving the center slightly thicker than the edges.

Spoon about 2 tablespoons of the chilled custard filling into the center of each dough circle. Gather the edges of the dough up and around the filling, pinching to seal completely. Roll the sealed bun gently between your palms to smooth the surface.

Step 4: Steam to Perfection

Line a steamer basket with parchment paper, poking small holes to allow steam to circulate. Place the buns in the basket, leaving 1-2 inches of space between each for expansion. Cover and let rise for 15-20 minutes until slightly puffed.

Bring 1-2 inches of water to a boil in a pot that fits your steamer basket. Place the basket over the boiling water, cover with a lid, and steam for 15-18 minutes. Check the water level halfway through and add more if needed. The buns are done when they’ve expanded significantly and feel firm to the touch.

Remove the buns from the steamer and let them cool for 5 minutes before serving. They should be soft, fluffy, and filled with a creamy, sweet custard center.

Creative Variations of This steamed egg custard bun

Matcha Green Tea Twist

Add 1 tbsp matcha powder to the custard filling mixture for a vibrant green hue and earthy flavor. I balance it with an extra 1 tbsp sugar since matcha can be bitter. The color is stunning, and the flavor pairs beautifully with the sweetness. 🌟

Chocolate Lover’s Version

Replace 2 tbsp custard powder with 2 tbsp cocoa powder and add ¼ cup mini chocolate chips to the filling. The chocolate custard becomes rich and decadent, almost like a molten lava center when warm.

Salted Egg Yolk Surprise

For a savory twist, replace the vanilla custard with 1 cooked salted egg yolk (available at Asian markets) mixed into the filling. The salty-sweet contrast is addictive. I like to add a pinch of white pepper to enhance the egg flavor.

Pandan Infusion

Steep 2 pandan leaves in the ¼ cup warm milk for the dough, then remove before mixing. This gives the buns a fragrant, floral aroma that complements the custard. Pandan extract (½ tsp) works if fresh leaves aren’t available.

Ube Purple Custard

Mix 2 tbsp ube halaya jam into the custard filling for a vibrant purple color and nutty vanilla flavor. The natural sweetness of ube reduces the need for extra sugar. I find this variation especially popular with kids. 💛

Coconut Cream Dream

Swap the heavy cream for coconut cream and add 2 tbsp toasted coconut flakes to the filling. The tropical flavor works surprisingly well with the soft bun texture. Use full-fat coconut cream for best results.

Frequently Asked Questions