Dump the Oreos and Butterfingers into a gallon ziplock back and seal tight. Using a rolling pin or meat mallet, crush the Oreos and Butterfingers until they are in small pieces.
Combine the crushed Oreos and Butterfingers with the melted butter.
Press half of the Oreos and Butterfingers into the bottom of a 7x11 in baking dish. Set aside.
In a microwave safe bowl, combine 1 tsp of butter with 3/4 cup of chocolate chips. Microwave for a minute and a half. Stir butter and melted chocolate, until it's smooth. Then thinly spread the melted chocolate onto the Oreo and Butterfinger crust. Place the base in the freezer while you prep the ice cream.
To prep the ice cream: Using scissors cut open the sides of the ice cream container, remove the brick of ice cream and place it on a cutting board.
Slice the ice cream into six sections. Get the Oreo base out of the freezer, then lay the ice cream in flat, so the crust is covered. (If needed, the ice cream can be cut into smaller sections to make it fit in the pan.) Using a knife spread the ice cream so it's smooth. Removing any cracks in the ice cream.
Freeze for half an hour.
Take your ice cream out of the freezer and press the remaining Oreo and Butterfinger topping on top. Place it back in freezer.
While the dessert is in the freezer, melt the remaining chocolate and butter for a minute and a half, then stir until it becomes smooth. Take the dessert out of the freezer and thinly spread the remaining melted chocolate on top.
Place the dessert in the freezer to harden at least 30 minutes. When it's time to serve, cut into bars and enjoy!