Silhouette atty the way!! It is the machine that the inventor of this technique uses and I agree that it is the best one for this method of cake decorating. You do not use cartridges, so after the initial investment, you don't invest more money for cartridges. For some reason when ever we put in a link to the web site for more information it is blocked. You can find the information at deseretdesigns just add the www and .com
Also, if you are interested in a cutter you may want to check out icingimages icing sheets. I use them and think they are the best on the market of electronic cutters. I use gum alot, but I do like the icing sheets, especially for print and cut (something you can't do with a cricut)