Into a big mixing bowl, add the room temperature butter, sugar, brown sugar, salt, vanilla extract, and cream it with an electric hand mixer for 2-3 minutes or until it’s creamy and light in color.
Add the egg, and egg yolk, and mix until combined and creamy.
Then, add the flour, and baking soda, and mix with the hand mixer until almost combined.
Add the chopped cookies and cream chocolate and the oreo chunks, and fold with a spatula until the mixture is just combined.
Cover the bowl with plastic wrap and let the dough rest in the fridge for at least an hour. We let the dough rest in the fridge overnight.
Use a cookie scooper to scoop out the cookies or scoop the cookies with a tbsp, 1 ½ tablespoon at a time.
Place the cookie dough balls onto a parchment paper-lined baking sheet, and bake in a 180c (350f) preheated oven for 11-12 minutes.
Immediately add white chocolate chips on top. Let the cookies cool for 5 minutes, then transfer them to a wire rack to cool completely.