Step 1

Line a 6-inch cake pan with parchment paper. Preheat oven to 355℉/180℃.

Step 2

In a mixing bowl, whisk together all the dry ingredients (glutinous rice flour, sugar, cocoa powder, baking powder, and salt).

Step 3

In another bowl, combine all the wet ingredients (egg, melted butter, and milk).

Step 4

Pour the wet ingredients into the dry ingredients, mix until well combined.

Step 5

Pour half of the batter into the prepared cake pan. Add a layer of chocolate discs. Pour the rest half of the batter over the chocolate discs. Smooth the top with a spatula.

Step 6

Bake in the preheated oven at 355℉/180℃ for 45 minutes.

Step 7

Remove the cake pan from the oven. Gently lift the parchment paper to remove the mochi brownie from the pan and transfer it onto a cutting board. Cut the mochi brownie into 6 pieces.

Step 8

If desired, place a chocolate bar on top of the sliced brownies and return them to the oven to bake at 220°F/105℃ for 2 minutes to create a molten chocolate topping.