Just made my own (http://i51.tinypic.com/dpvjv8.jpg), and goodness, they are wonderful. I rather like my carrot cake to have little flecks of visible carrot throughout, so I didn't mind using the larger hole on my grater for my cupcakes.
For the sake of posterity: I also had enough batter for 14 standard sized muffins with a bit of frosting left over even after that. I liked another commenter's idea of using a piping bag to make little carrots as decoration, but I'm far too lazy for that sort of thing.
Thank you for the wonderful idea!
April 7, 2011 at 9:42pm