Re: Using Other Companies' Brand Names in Store Menu and Decorations
If you were using actual Oreo's, you could say "cookies and cream with Oreo cookie pieces or something similar. In that use, it is descriptive. If you advertise it as "Oreo's" there is the likelihood that people will assume the Nabisco company has approved of the ice cream product which you cannot do without their permission.
as to using the name "Oreo's" as you suggest; again, it implies there is some company connection. Most likely not allowed without permission.
I am not an attorney and any advice is not to be construed as legal advice. You might even want to ignore my advice. Actually, there are plenty of real attorneys that you might want to ignore as well.