The Notta Cookie is not a cookie but can be used like one to practice your decorating.  You can practice everything from icing to stenciling on this great product.  Great for making display cookies as well. 
The Notta cookie measures 3.5 inches round.
Notta Cookie is an amazingly simple, and extremely useful, practice cookie! That's it. Start trying decorating techniques faster! Practice up your stenciling, painting, piping, lettering, etc. without baking anything. Once you're got it down, you'll be ready to decorate real cookies with less waste.
So yeah, it's a "dummy" cookie - but how "smart" is that?
Notta Cookie is reusable, and dishwasher safe. Just clean it off and use it again... and again... and again! It's also an amazing tool for teaching decorating classes! Imagine grabbing a bunch of Notta Cookies from a bin and handing them to students - with no baking prep!