Remove the fermented rice flour from the refrigerator then transfer the water on top in a measuring cup.
Add ¼ cup water to the fermented water. NOTE: If you did not get enough fermented water, add more water to get a total of ½ cup water
Transfer the water mix in a cooking pot and bring to a boil. Remove from heat and set aside.
In another bowl, add 3 tbsp + 2 tsp glutinous rice flour the slowly pour the fermented water mix you just boiled. Sir until the consistency is pasty/sticky.
Add the fermented rice flour in small batches while mixing until you finish all of the flour.
Add sugar and stir until you get a runny or loose consistency. NOTE: you can use a strainer to remove lumps that formed.
Add baking powder and whisk until smooth and thick.
Transfer the batter in moulds and steam for 20 - 25 minutes or until toothpick comes out clean when inserted.
Remove the Puto from moulds and serve with grated coconut on top. Bon Appetit!