Steamed Rice Cake

This is a Chinese steamed rice cake named as Songgao. Made with rice flour and sugar. It can be a wonderful dessert.
Full recipe: https://www.chinasichuanfood.com/steamed-rice-cake-songgao/

Ingredients
1 cup rice flour
1/2 cup sticky rice flour
3 tbsp. white sugar
3 tsp. sweet potato powder or Ube powder
95 ml water