Blend White Sugar to Make Icing Sugar

Make your own icing sugar. There is a huge difference in the cost of regular white sugar and icing sugar, yet icing sugar is only white sugar ground finer. I have a little "magic bullet" food processor and its a snap to throw a cup of sugar in there and grind it up. It's a little bit grainier but pretty close, and once you have used it in a recipe, you sure can't tell the difference.