Cover the bottom of the springform with parchment paper with extra paper outside of the pan.
Crush about 2 rows of Oreos into very finely chopped crumbs (place them in a plastic sealed bag and use a rolling pin to crush them, or finely chop them in a food processor).
In a medium bowl, combine the crushed Oreos (all except about 3/4 cup) with the melted butter.
Press down the Oreo mix onto the bottom of the springform pan.
OPTIONAL STEP: place the Oreo crust in a preheated oven at 350F for 5 minutes. Let cool completely before moving onto next step.
Melt the bottom layer of ice cream (either soften in the microwave or have it soften on your counter) and spread it evenly on top of the Oreo crust. Sprinkle ice cream with about half of the remaining Oreo crumbs.
Place the cake back in freezer for at least 1 hour or until frozen.
Repeat softening the second ice cream container and spread on top of Oreo crumbs and place back in freezer.
Add toppings and enjoy!