Preheat oven to 350° F. Line a baking sheet with either parchment paper or a silicone baking mat.
In the bowl of a stand mixer or with an electric hand mixer, cream together the butter, granulated sugar and brown sugar until light in color and fluffy in texture.
Scrape the sides of the bowl and then add in the egg and vanilla. Mix until well combined.
Add the flour, cheesecake pudding mix powder, salt and baking soda. Mix until the dough comes together.
Add in the chopped oreos and white chocolate chips, mix until thoroughly distributed.
Scoop your cookie dough out into equal sized portions, approx 1 1/2 tbsp of dough for small cookies (scoop #40) or approx 3 tbsp of dough for larger cookies (scoop #24).
Bake at 350° F until the cookies spread slightly, puff up and no longer look wet and glossy on the tops. The cookies will be very soft even when they come out of the oven because of the pudding mix. For the small cookies, bake for 7-9 minutes, for the larger cookies bake for 9-11 minutes.
Allow the cookies to cool on the pan for 10 minutes before transferring to a wire cooling rack.
Enjoy!