Mix the Milk, Sugar, and Yeast together
Mix in the Flour, Salt, and Baking Powder
Cover in Oil and knead until mixed in
Transfer to flat surface and knead some more. About 5 minutes
Divide into 8 pieces and roll each piece into a ball
Flatten into a circle and place Custard in the center
Close the dough by pinching the edges into each other then smooth it out into a ball
Place each completed ball on parchment paper and let stand for 12 minutes
Steam on Medium for 10 minutes and wait 3 minutes before removing from steamer