To start, preheat your oven to 350°F. This temperature ensures that your mochi brownies will bake evenly. Next, line an 8 by 8-inch baking pan with parchment paper. This will make it easier to remove the brownies once they are done.
Add mochiko, cocoa powder, sugar, and baking powder in a medium bowl. Whisk these ingredients together until they are evenly mixed. This step is crucial for ensuring that the dry ingredients are thoroughly combined.
Now, in a large bowl, add melted butter, eggs, milk, and vanilla extract. Whisk these ingredients until they are well combined, and no egg streaks remain. This mixture should be smooth and uniform.
Slowly add the dry ingredients to the wet mixture. Mix until everything is well blended and you have a smooth batter. Pour this batter into the prepared baking pan, spreading it evenly across the surface.
Sprinkle some chopped chocolate on top of the batter. This will add a delightful crunch and extra chocolatey flavor to your brownies. Place the baking pan in the oven and bake for 60-70 minutes. The mochi should be set, and a toothpick inserted into the center should be clean.
Once the mochi brownies are done, let them cool completely before slicing and serving. This will make it easier to cut them into neat pieces and enjoy.