"x-archive:no" > wrote in message
...
> How many cups or ounces are in a box of powdered sugar? I guessed 16
> oz, but I was probably wrong since my frosting was very runny.

What were the other ingredients in the frosting? Butter maybe? From
experience, if you get butter more liqued than softened, you end up with
runny frosting. IMO, this has more of an impact than the amount of powdered
sugar.