In a saucepan, take milk and bring it to the boil. Add chopped chocolate and keep it aside until chocolate melts.
In a mixer grinder, make the powder of leftover biscuits.
Transfer the powdered biscuits in a mixing bowl. Add chopped cranberries.
Start adding melted chocolate and keep stirring. The batter should be smooth.
Meanwhile, preheat the oven to 160 °C.
Pour the prepared batter into an 8x8 inches baking pan lined with parchment paper.
Garnishing it with chopped nuts and cranberries is totally optional.
Bake this brownie mixture into a preheated oven for 15 minutes.
Once baked, demold the brownies and cut into squares.
