Make fudge brownies according to package.
Let cool completely.
Press a layer of ice cream into the bottom of the 10" Springform cake pan.
Scatter brownie and crushed Oreos across the ice cream
Zig zag chocolate syrup over the brownie/Oreos
Repeat each layer until you reach the top of the pan – ending with a final layer of ice cream
Freeze until hard
Run warm water over the sides and bottom of the pan until you can release the spring easily
Flip over and drop the cake onto a plate
Frost and decorate as desired – for this 4th of July cake I used star sprinkles, so easy!
Refreeze until ready to serve