This recipe can be halved if you don't have enough people to eat a whole one.
1 package Oreos
1/2 c melted butter
1/2 gallon ice cream, brought almost to room temperature (we use vanilla, but the choice is yours)
1 jar hot fudge
Crush cookies and mix with butter. Place into the bottom of a 9x13 pan. Freeze. Add ice cream. Freeze. Add fudge. Freeze. Add Cool Whip. Freeze. Add nuts if you want them. Freeze. Eat.