Method; Preheat oven to 190°C for 10 minutes and grease a rectangular flat baking tray.
Take a large bowl and add both the flours, salt, baking powder. cocoa powder and mix it well with a fork.
Take another bowl pour milk, oil, vanilla essence in it and add powdered sugar in it. Whisk all the ingredients well with a fork.
Pour the dry ingredients into the wet ingredients and stir it lightly to combine and make a smooth batter.
Pour the batter onto the greased baking tray and smooth the top with a spatula. Bake the brownie for about 30 minutes or so.
Remove from the oven and let it cool completely. Slice the Brownies and dust with powdered sugar.