Preheat the oven to 350°F (175°C). Pass a banana leaf briefly over an open flame (or if you have an electric stovetop for a few seconds in a dry pan over high heat) to soften it and bring the natural oils in the leaf to the surface.
Line an 8-inch round baking pan with the banana leaf, pressing it flat against the bottom and sides. Trim any excess that extends beyond the rim of the pan. If you can’t find banana leaves, you can use lightly oiled parchment paper instead.
In a large mixing bowl, whisk together the rice flour, glutinous rice flour, baking powder, sugar, and salt.
In a saucepan over low heat, melt the vegan butter.
Pour the melted butter and coconut milk into the dry ingredients and stir until fully combined into a smooth batter.
Pour the batter into the prepared pan. Bake for 25 minutes, then check the surface for light browning.
If using vegan cheese, grate it evenly on top. Continue baking for an additional 5–10 minutes, or until a toothpick inserted in the center comes out clean.
Remove from the oven and allow to cool in the pan for 10 minutes before brushing with melted butter and sprinkling with grated coconut.