Make cookie dough and divide it in half.
Use half to make one layer on the bottom of the prepared pan.
Wrap the other half in plastic wrap and put it in the fridge.
Make ice cream.
Pour ice cream on top of the cookie dough in the pan. Use a knife to make it an even layer.
Place in the freezer for at least 4 hour or overnight.
Take the wrapped cookie dough out of the fridge. Allow it to come to room temperature.
Take pan out of the freezer. Make another laver of cookie dough on top of the ice cream.
Place back in the freezer for at least four hours.
Take out of the pan and cut into squares.