Bake brownies according to package directions. Set aside to cool completely or pop in the freezer.
In a blender, combine ice cream and milk until thoroughly blended. Add brownie chunks and pulse to keep some chunky brownie bits, or puree for a smoother shake.
Garnish with whipped cream, chocolate nibs or MORE brownie… have fun with it, just remember to show us what you made by tagging @missjonesbakes and #madewithmissjones!