Crush the Oreo cookies and line them in the bottom of a 9 x 13 inch pan.
Soften ice cream slightly. Slice the ice cream and lay on top of the Oreos.
Let it soften a little more so you can carefully spread it evenly over the Oreos.
Then place in freezer for about 40 minutes.
Remove from freezer and drizzle melted hot fudge over the ice cream. Freeze again for 20 minutes.
Remove from freezer and cover with Cool Whip and sprinkle grated Hershey Bar over the top.
Top each piece with a mini-Oreo.
Notes
You can change out the ice cream for either a cookies and cream or a mint chocolate chip ice cream to change up the flavor to the Oreo cookie ice cream cake.