Oreo Cookie Ice cream Pie

1 package Oreo Cookies crushed to crumbs ( take cream out of 1/2 cookies in the package before crushing)
1/2 cup Butter melted
9oz Cool Whip thawed
1/2 gallon vanilla ice cream

Chocolate sauce: Melt sweetened chocolate bar, 2tsp butter, 3tbsp evaporated milk. Bring to a boil. Add vanilla extract and mix. Set aside to cool it down.

Reserve 1/4 cup of cookie crumbs and set aside.
Mix remaining crumbs with butter. Press into a pie plate and place in freezer for 15 minutes to set up.
Take softened ice cream and mix the reserved crumbs. Spoon in the ice cream into the pie shell and spread. Pour chocolate sauce on top of ice cream and freeze for 30min. Spread a layer of coolwhip. Freeze overnight.