Preheat your oven to 350°F. Line two baking sheets with parchment paper and set aside.
In a medium bowl, whisk together the flour, cocoa and baking soda and set aside.
In a large bowl attached to stand mixer with the paddle attachment, or using a hand mixer with beaters , cream together the butter, brown sugar, granulated sugar and pudding mix until well combined. Beat in the eggs and vanilla until fully incorporated.
Slowly beat in the flour mixture, adding in increments, until fully combined.
Fold the Oreo cookies into the batter, mixing throughout.
Form cookies using a tablespoons sized cookie scoop and place on a parchment lined baking sheet two inches apart.
Bake for 10-12 minutes, or until the bottoms are golden brown are the sides of the cookies are well set and cooked.
Remove and let cool on the sheets for 5 minutes, then transfer to a wire cooling rack to cool completely.
Store in a closed container at room temperature for up to 5 days, or store in the freezer for up to 3 months.
Notes
Calories will depend on which Oreo cookies you add to the mix