In a large bowl, stir together cake mix, pudding mix, eggs, sour cream, oil, and 1/2 of the coarsely chopped Oreos (eyeball it).

Spray a large tube pan or bundt pan with non-stick spray.

Spread half the batter evenly into prepared pan.

Arrange the 8 whole Oreos around the batter.

Spread with remaining batter.

Bake at 350 degrees for 40-45 minutes, or until a toothpick inserted near the center comes out clean.

Remove pan to a wire rack to cool for 10 minutes, then invert the cake onto the wire rack to cool completely. Do not cool it completely in pan - it will stick and become difficult to remove!

In a small microwave-safe bowl, combine chocolate chips, heavy cream, and butter.

Microwave on high at 30-second intervals until chocolate is melted and the mixture is smooth.

Drizzle over bundt cake.

Allow 10-15 minutes for ganache to set.

In a medium bowl, whisk together pudding mix and cold milk.

Fold in whipped topping.

Spread or pipe over the cake.

Sprinkle with remaining Oreo cookie pieces. Cut and serve.