I’ve seen other cake recipes include the chunks of golden Oreos in the cake layers (baked in) and between the cake layers on top of the filling. I wouldn’t add chunks of golden Oreo cookies to the cake batter because this recipe wasn’t formulated with that in mind so it could affect the bake. And while you can add pieces of Oreos in between the cake layers on top of the filling, you don’t really need it because you have the golden Oreo crust!