In a pan, over medium heat, add one cup of confectioners (powdered) sugar, and two tablespoons of liquid. For classic-glaze, I use filtered water.
Whisk for about two minutes, until combined.
Once the sugar has totally dissolved, the glaze/icing is ready to use.
If your glaze stiffens before you are done using it, simply re-heat and stir to get it back to liquid. You can do this in the microwave, or returning the mixture to stovetop.
The end result is a heavier, firmer, and more solid-looking/opaque finish. Pour, drizzle or dip onto your favorite things. If you are sprinkling crystalized sugar sprinkles, do so right after pouring, since the glaze will set quickly.