It took me several weeks of walking by Baking Betty's cookies at Downtown Disney before I finally stopped to see what they were all about. Baking Betty's bakes their cookies locally and has two kiosks in Orange County (the one is at Fashion Island).
My mom and I split a cookie (since they were $4 each....yikes!). We picked the Cookies & Cream cookie: chocolate chip base cookie with Oreos, semi-sweet chocolate chips, and white chocolate chips. The cookie was pretty good, but not something I'd pay $4 again for.
You can buy their cookies online. A baker's dozen sells for $36.
Have you tried Baking Betty's cookies yet?