Preheat oven to 350 degrees Fahrenheit
Combine wet ingredients (eggs, milk, coconut milk, melted butter, vanilla) and sugar into a large bowl. Mix using a whisk until well combined.
Sift in the dry ingredients (rice flour, baking powder, salt) and mix until just combined (do not overmix).
Grease a large 10x15 baking pan with cooking oil spray or using a basting brush and oil.
Pour mixure into the baking pan then sprinkle the shredded coconut all over the top.
Bake for about 1 hour or until a toothpick inserted into the middle of the pan comes out clean.
Let cool for about 30 minutes before serving.