Step 1

Cut sweet potato into chunks, place in separate bowls and steam until they soften, about 20 minutes.

Step 2

While they're still hot, transfer the both kinds of sweet potato into separate mixing bowls, then add in sugar and butter in each bowl. Use a potato masher or fork to mash until you reach the consistency of mashed potato.

Step 3

Add tapioca flour in each bowl, mix and knead to form a ball. If the dough is too wet, add more tapioca flour; if it's too dry then add some water.

Step 4

Preheat oven to 350°F (180°C)

Step 5

Form the dough into 1 inch little balls and place them on a baking pan lined with parchment paper or silicone mat. Moistening your hands a little bit will make rolling the ball easier.

Step 6

Bake for 16-18 minutes or until the bottom part is golden brown. Let cool for 5 minutes before enjoy it.