How to make a cake with pure rice flour?

1 .350g of fine sugar and 500g of water.

2. Low gluten flour 450g corn flour 50g baking powder17.5g ...

Sports:?

(1) Mix the material 1 evenly until the fine sugar is dissolved without particles. ?

(2) After sieving, add material 2, stir until the batter is very smooth and bright, and let it stand for 5 ~ 10 minute. ?

(3) Spread a paper cup mold in the bowl, then pour in the batter until it is full for about 7 minutes, and then steam it in a steamer for about 12 minutes. ?

Don't open the lid when cooking, otherwise the steam will escape and the cake will not rise.