In a medium bowl, whisk the flour, baking soda, baking powder, and salt until combined; set aside.

In the bowl of an electric stand mixer fitted with a paddle attachment, cream the butter until smooth. Add in both sugars and mix on high for 3 minutes until light and fluffy. Add the egg and egg yolk one at a time, mixing after each addition until combined. Add in the vanilla. Then stir in the pudding mix.

With mixer set on low speed, slowly add the flour mixture into the wet mixture until everything has been incorporated. Stir in chopped Hershey Cookies 'n' Creme chocolate.

Preheat the oven to 350ºF. Press 1/2 of the dough into a greased 10-inch cast iron skillet. Evenly space the Oreos on top. Fill the empty spaces with Oreo candy bar sections. Sprinkle white chocolate chips evenly throughout.

Take chunks of the remaining dough, flatten slightly, and layer them side by side on top of the Oreo layer. Try to cover as much of the Oreos as possible.

Bake for 23-26 minutes, or until edges are lightly golden. Allow to cool for at least 20-30 minutes. Serve with a scoop of ice cream.