In a bowl, mix flour, yeast, sugar, and purple sweet potato puree.

Knead until you form a smooth purple ball of dough.

In another bowl, mix flour, yeast, sugar, and warm water to create white dough.

Knead until you form a smooth white ball of dough.

Using a rolling pin, roll out the white dough into a rectangle on a chopping board or flat surface. It does not have to be a perfect rectangle as long as the dough is flattened into a long oblong or rectangular sheet.

Repeat step 1 for the purple dough.

Then, place the purple potato dough over the white dough.

Roll the two dough sheets inward, with the purple dough inside.

Roll it once more to make it longer and allow the two dough sheets to come together. This should give you a cylindrical dough.

Next, use a dough cutter or knife to slice the rolled dough into small pieces about 1 inch wide.

Flatten each dough piece using a rolling pin. This should give you small circular wrappers with a purple spiral pattern on both sides.

Choose the side of the wrapper with a smaller spiral pattern and place the filling in the center. In this way, the larger spiral pattern is placed on the exterior for better presentation.

Wrap the filling by taking the edges of the wrapper to the center and pinching them together to seal.

After assembling all the buns, let them proof in the steamer until they rise 1.5 times their size.

Steam buns for 15 minutes once the water boils.

Turn off the heat and let it sit for 2 more minutes in the steamer. Do not open the steamer while letting it sit. Otherwise, you risk deflating the buns and making them shrink.

Lastly, enjoy your delicious purple potato buns for breakfast or a sweet snack after a savory meal.