Heat oven to 350 Degrees F. Grease a metal 9x13 pan and line with parchment paper leaving a few extra inches of overhang over the long edges of the pan. This is so you can use it to life the whole slab of mochi out of the pan once cooled for easier cutting.
In a large bowl mash the banana then whisk in the eggs, melted butter and vanilla, mix well. Then add in the coconut milk and mix again.
425 g super ripe bananas, 3 large eggs, 115 g butter, 1 Tablespoon vanilla bean paste, 300 g coconut milk
In a separate bowl combine the entire box or 454 g of mochiko flour, the sugars, baking powder and baking soda, salt and spices and whisk well.
1 box Mochiko flour - 454 g, 200 g light brown sugar, 100 g granulated sugar, 2 teaspoons baking powder, 1 teaspoon baking soda, ½ teaspoon kosher salt, 1 teaspoon ground cinnamon, ½ teaspoon grated nutmeg
Add the mochiko mixture to the banana mixture and mix until well combined and no flour streaks remain. Pour into the prepared pan. Generously sprinkle the top with the raw sugar
Coarse/raw sugar for sprinkling over the top of the mochi before baking
Bake for 60 minutes. A skewer or toothpick inserted into the middle will come out with a few crumbs and that’s ok.
Let cool in the pan long enough to be able to life the slab of mochi out of the pan. I let it cool fully in the pan before removing to slice.
Slice into however many squares you like. Keep in an airtight container up to three days. After three days it tends to loose the same chewy mochi quality. Mochi is best eaten the same day or within three days of baking.