Preheat oven to 350 degrees F. Line a baking sheet with parchment paper or a Silpat. Set aside.
In a medium bowl, sift flour, baking soda, salt, and cocoa. Set aside.
With a stand mixer or hand mixer, cream the butter and sugars together until smooth. Add in eggs and vanilla and mix until well combined.
Add the dry ingredients and mix on low until just combined. Don't over mix.
Stir in the chopped Oreos, chocolate chips, and mint chips. Drop cookie dough onto prepared baking sheet, about 2 inches apart.
Bake cookies for 10 minutes, or until the cookies are set around the edges, but still soft in the center. Don't over bake. Remove from oven and let sit on baking sheet for 3 to 5 minutes. Move to a cooling rack and cool completely.