Grease the cake tray with butter and stick butter paper in it

In a large bowl, melt butter and chopped chocolate in microwave until it melt completly

Once melt, add sugar, condensed milk and milk to the same bowl and whisk them.

Once they mixed add vanilla essence followed by dry ingredients (flour, cocoa powder, baking powder and baking soda)

Whisk everything until it becomes smooth batter. Pour it onto you prepared tray and line Oreo biscuits on top

Once it done bake the brownie cake in a Pre heat oven at 180 degree celsius for 25 mins.

After bake insert tooth pick to check it baked properly. Than keep aside till it come on room temperature.

Than cut into pieces you want