Well, I made the Irish Potato Candy. Did you try? In case you didn't, but might try it, here are a couple of things I found as I made them. (See my post with the recipe, if you haven't already.)
The recipe says it makes 60 candies, but mine only made about 40. I think some of my potatoes are pretty big, though. After you add the confectioners' sugar, it takes a while to beat to a smooth consistency--it seems like it will never get there, but it does. Just use a high speed on your mixer. And it's definitely worth adding 1/2 a tablespoon of cocoa to the cinnamon. It adds a really good flavor.