This post might be common sense to everyone else, but once I realized that you could turn sugar into powdered sugar at home I felt disappointed that I had gone to the store on more than one occasion to go buy powdered sugar.
To do this you need a wheat grinder or a blender. I have a fancy blendtec that I use for it and I’m not sure if a regular blender would work. If it works for you, please let me know!
Put about 1 1/2C of Sugar into the blender. Blend on Speed 5 for about 20 seconds. When it stops, use a spatula to make sure the sides and corners are being ground as well. They usually are, but with powdered sugar I don’t take a chance. Blend for another 20 seconds and then test the sugar to see how grainy it is. I usually grab a small amount and rub it between my fingers. If it feels coarse at all, then blend for another 20 seconds. Keep testing it and reblending it until it is fine and soft.
For a wheat grinder, follow the directions you use for grinding wheat but test the powdered sugar every so often to see how soft it is. I usually need powdered sugar for frosting and I don’t want gritty frosting, so I take every effort to make sure its perfect. I have never seen my powdered sugar be over-powdered so I guess it’s ok!