Whisk mochiko, baking powder, cocoa, sugar, brown sugar, instant coffee, and salt.
Add coconut milk, evaporated milk, melted butter, and eggs.
Mix dry and wet ingredients together, making sure there are no lumps of mochiko powder at the bottom of your bowl.
Pour into a 9x13" pan and bake for one hour.
Let cool and slice into squares. Leftovers can be kept sealed at room temperature.
Notes
*Regular cocoa powder for baking can be used instead of dutch process, but dutch process will give you a more intense flavor.**This recipe was updated slightly in 2023 to be fudgier and chocolate-ier. I still love the original recipe, which was lighter and cakier. If you want the original recipe, increase mochiko to 2 1/2 cups and reduce cocoa powder to 3 tbsp.***I sometimes like to use just 2 tsp of baking powder for a denser texture. A full tbsp is fluffier as shown in the photos.