Preheat oven to 180 degree C. Line a square pan with parchment paper and set aside.
Take butter in a bowl and mix well till creamy.
Add in sugar and vanilla extract and beat till creamy.
Add in ½ of the rice flour and mix.
Add in one egg and combined.
Now add remaining rice flour along with Egg.
Add in coconut milk and regular milk and mix gently.
Spoon this into a baking pan and spread evenly.
Pop this in oven and bake for 50 mins to 1 hour.
Remove and cool for 20 mins.
Slice and serve.
Notes
Use glutinous rice flour | sweet rice flour for proper texture. It is also called as sushi rice flour | mochi flour | mochiko. Normal rice flour doesn't work.
Don't skip on the butter, it adds nice flavour.
Use thick creamy coconut milk for more coconut flavour.
You can use evaporated milk instead of regular milk. but regular milk work just fine.
Don't over bake the cake else it will turn hard.
Use right size pan so the cake will have depth and more chewiness. I used larger pan so my cake was shallow. More thick cake taste more chewy and delicious.
STORAGE
If you can resist this cake stays good for 2 days at room temp. But it is best served fresh.