In a bowl mix your yogurt and half the cool whip together and mix it well.
Spread in oreo pie crust
Top with remaining cool whip and take your chocolate bar and shave some on top. I used a potato peeler to shave and sprinkle the top.
Freeze for 3-4 hours.
About 20 minutes before serving.. take the pie out and keep on the counter. Ready to serve. Enjoy!