01 -
Get your oven hot, setting it to 350°F ahead of time. Line an 8×8 pan with parchment, leaving some extra edges for easy lifting once it’s baked.
02 -
In a medium-sized bowl, mix together the cocoa powder, sugar, baking powder, and mochiko. Be sure there are no clumps of cocoa when you’re done.
03 -
Grab a large bowl and stir the butter, eggs, milk, and vanilla until they form a smooth and unified liquid. The eggs need to vanish into the mix, no streaks at all.
04 -
Pour the dry mixture into the wet mixture and stir until it forms a thick, smooth batter. Look out for any unmixed pockets of dry ingredients.
05 -
Spread the batter into the parchment-lined pan. Use a spatula to smooth out the top. Scatter the chopped dark chocolate on top, lightly pressing on any bigger chunks to make them stick.
06 -
Bake for about an hour or so, between 60 and 70 minutes. You’ll know it’s done when the middle is set and a toothpick poked in comes out nearly clean, maybe with a smudge or two.
07 -
Let the brownies cool down all the way in the pan—it’s really important. Cutting before it cools will make a sticky mess because the mochi texture is super soft when hot.