Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking dish.

In a large bowl, whisk the eggs until frothy, then add sugar and mix until dissolved. Stir in coconut milk and melted butter until smooth.

In another bowl, whisk together sweet rice flour and baking powder, then fold this dry mixture into the wet ingredients until just combined.

Pour the batter into the prepared pan and bake for approximately 1 hour and 25 minutes until golden brown.

Once baked, let it cool for about 20-30 minutes before lifting it from the dish.

Slice into squares and serve warm, at room temperature, or chilled.