Pour approximately half the mixture into the lined pan.
Create a single layer of peppermint bark to cover the batter in the pan. You may have to break some of the squares to cover the surface.
16 Ghirardelli peppermint bark squares
Pour the remaining batter overtop of the peppermint bark and bake for 30-40 minutes. The brownies will seem undercooked, but the edges will appear done.
Let cool completely (overnight if possible) and cut into squares. Enjoy!
Notes
The brownie batter can be fully prepared in the saucepan or microwave-safe mixing bowl that you heat the butter and milk in. Be sure to use one big enough to prepare the brownie batter.Add the cocoa powder while the butter and milk are still hot to help the cocoa powder dissolve.