Grease a mould with butter.
Preheat oven at 180°c.
In a mixer jar add unibic choco cookies and make fine powder.
In a bowl add cookies powder, cocoa powder, baking powder, baking soda and mix well.
In another bowl beat butter until light and fluffy.
Now add condensed milk, vanilla essence, yoghurt and beat the mixture well.
Add dry ingredients mixture and mix well.
Pour the batter in mould and tap the mould 4 - 5 times.
Now bake it for 20 minutes.
Insert a toothpick and check it. If batter sticks, bake for another 5 minutes.
Now melt milk chocolate .
Garnish the brownies with milk chocolate.
Pour some chocolate sauce on it.
