Cream the butter, shortening and sugars together until fluffy, about 2 minutes.
Add the eggs and vanilla, beating until well blended.
In a separate bowl whisk together the flour, cocoa powder, baking soda and salt. Gradually add this to the butter, mix until fully incorporated.
Using a spatula fold in the Oreo's, chocolate chips, and cookies n' cream bar. It is very thick, don't worry!
Chill the dough for 30 minutes before baking.
Scoop rounded tablespoonfuls of dough onto a baking sheet. Bake for 10 minutes, or until just barely set. Be careful, you don't want to over bake these.
Remove from oven, and cool on the baking sheet for 10 minutes. Transfer to a wire rack to cool completely.